Back to dashboard Episode 408

DIP Episode 408 - USMLE Step 2/3 Rapid Review Series 81

MixedMedium4 - HighHas Q&A

Step 2Step 3MedicineUSMLEStep 2Step 3

Topic

Depression screening; Acute abdomen differential diagnosis (Cecalitis vs. Ascending Colitis); GI surgical complications (Dumping Syndrome)...

Key Takeaway

When evaluating acute abdominal pain with suspected biliary obstruction, the presence or absence of jaundice and fever is critical for differentiating between ascending colitis (common bile duct obstruction) and simple cecalitis (cystic duct obstruction).

Runtime: — min

Published: 2022-08-08

Completed audio: Yes

Completed notes: Yes

Anki made: Yes

Section: RAPID REVIEW SERIES

Open Notion notes Episode source

Episode Notes

Source / episode info

Episode: 408
Title: Divine Intervention Episode 408 – USMLE Step 2/3 Rapid Review Series 81
Published: 2022-08-08
Source: Episode page

One-liner

This episode provides a rapid review focusing on high-yield clinical scenarios including mandatory suicide risk evaluation in depression, the differential diagnosis of acute intra-abdominal processes based on bile flow/jaundice status, management of severe local infections like Ludwig's Angina, and common post-surgical complications such as dumping syndrome.

High-yield summary

Suicide Risk Assessment: Any patient presenting with depressive symptoms (low mood, hopelessness) must be immediately evaluated for suicide risk; statements of hopelessness are a critical red flag.
Biliary Obstruction Differentiation: In acute abdominal pain: Fever + RUQ pain + Jaundice suggests common bile duct obstruction (Ascending Colitis); Fever + RUQ pain without jaundice suggests cystic duct obstruction (Cecalitis).
ERCP Role: Endoscopic Retrograde Cholangiopancreatography (ERCP) is both diagnostic and therapeutic for suspected ascending cholangitis/colitis, allowing stone removal.
Dumping Syndrome: This complication follows gastric surgery due to the unregulated flow of hyperosmolar contents from the stomach into the small intestine, causing severe osmotic diarrhea.
Local Infections: Thick, purulent conjunctivitis is often bacterial (Staphylococcus); contact lens use mandates suspicion for Pseudomonas keratitis; cellulitis involving the submandibular/sublingual space requires immediate consideration of Ludwig's Angina and airway management.

Learning objectives

Differentiate between various causes of acute abdominal pain based on the status of bile flow and jaundice.
Recognize the signs and immediate management priorities for severe local infections like Ludwig's Angina.
Understand the pathophysiology, triggers, and clinical manifestations of dumping syndrome post-gastrectomy.
Identify common bacterial pathogens associated with specific infectious sites (e.g., Staphylococcus in conjunctivitis; Pseudomonas with contact lenses).
Apply critical thinking to mental health scenarios by prioritizing suicide risk assessment over other physical complaints.

Board exam buzzwords

Condition	Key Finding	Association	Board Exam Tip
Depression/MDD	Statements of hopelessness ("Life is hopeless")	Suicide Risk Assessment	Always prioritize evaluating for suicidal ideation, regardless of the primary complaint.
Ascending Colitis	Fever + RUQ pain + Jaundice	Common Bile Duct Obstruction	The presence of jaundice (elevated direct bilirubin) strongly suggests common bile duct involvement.
Dumping Syndrome	Severe osmotic diarrhea post-prandially	Gastric surgery/Unregulated gastric emptying	Symptoms are triggered by food intake, not just general GI upset.
Ludwig's Angina	Pain under the jaw/submandibular space	Airway obstruction risk; Deep neck infection	Always assume potential airway compromise and prepare for intubation in severe cases.

Rapid review table

Topic	Key Point	Context	Exam Relevance
Acute Abdomen	Jaundice status dictates the differential diagnosis (Cecalitis vs Ascending Colitis).	Pain + Fever + RUQ tenderness.	Use bile flow/jaundice to distinguish between cystic duct and common bile duct obstruction.
Infectious Conjunctivitis	Thick, purulent discharge; Staphylococcus is most common.	General bacterial conjunctivitis.	If contact lenses are involved, immediately suspect Pseudomonas.
GI Surgery Complications	Dumping syndrome occurs due to rapid passage of hyperosmolar contents.	Post-gastrectomy/Bariatric surgery.	Symptoms are triggered by food intake (postprandial).
Local Infections	Ludwig's Angina involves the submandibular and sublingual spaces.	Severe cellulitis in the neck region.	High risk of airway compromise; management must anticipate intubation needs.

Board-speak -> diagnosis

Board-speak / Vignette phrase	Diagnosis / Concept	Why it fits
A patient post-gastrectomy reports severe, watery diarrhea immediately after eating.	Dumping Syndrome	Unregulated gastric emptying leads to hyperosmolar load in the small bowel, causing osmotic diarrhea.
Acute abdominal pain with fever and jaundice, following a suspected obstruction of the common bile duct.	Ascending Colitis (Cholangitis)	Jaundice indicates biliary obstruction; ascending colitis is typically associated with this pattern.
A patient presents with thick, purulent discharge from both eyes, especially in the morning.	Bacterial Conjunctivitis	The classic presentation and most common causative organism is Staphylococcus species.
Severe cellulitis involving the submandibular and sublingual spaces, causing rapidly worsening pain under the jaw.	Ludwig's Angina	This specific infection pattern involves these deep fascial planes and carries a high risk of airway compromise.
A patient with acute abdominal pain has fever and RUQ tenderness but no jaundice.	Cecalitis (Cystic Duct Obstruction)	Bile is still flowing through the common bile duct, preventing jaundice; obstruction is limited to the cystic duct.
The initial management for suspected ascending cholangitis/colitis involves both diagnosis and removal of obstructing stones.	ERCP	ERCP allows visualization and therapeutic intervention (stone extraction) in addition to diagnosis.

Differential diagnosis / distinguishing features

Conjunctivitis

Key Features	Distinguishing Findings	Next Step
Bacterial Conjunctivitis	Thick, purulent discharge; Staphylococcus is most common.	Topical antibiotics (e.g., erythromycin).
Contact Lens Keratitis	Symptoms associated with lens wear/contact lens use.	Suspect Pseudomonas aeruginosa; Requires prompt topical therapy and culture.

Local Infections

Key Features	Distinguishing Findings	Next Step
Ludwig's Angina	Severe cellulitis involving submandibular/sublingual spaces; rapid progression.	Airway management (Intubation) is paramount due to high risk of obstruction.
Osteomyelitis (Nail bed)	Infection following foreign body insertion or in immunocompromised hosts.	Culture and targeted antibiotics; Debridement if necessary.

Management pearls

Suicide Risk: Never dismiss statements of hopelessness; always initiate a thorough suicide risk assessment protocol.
Ascending Colitis Management: Initial empiric IV antibiotics must cover both Gram-negative rods (e.g., E. coli ) and anaerobes (Metronidazole).
ERCP Utility: Remember that ERCP is not just diagnostic but also therapeutic for biliary obstruction, allowing stone removal.
Airway Priority in Ludwig's Angina: Due to the deep fascial planes involved, swelling can rapidly compromise the airway; anticipate intubation even if initially stable.

Don't miss

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The difference between cecalitis (cystic duct) and ascending colitis (common bile duct) is defined by the presence of jaundice/bile flow status.

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Pseudomonas aeruginosa is a critical pathogen to remember in contact lens-associated keratitis, especially in immunocompromised patients.

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Dumping syndrome symptoms are triggered by the rate of food passage, not just the content itself.

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The combination antibiotic regimen for severe intra-abdominal infection should include coverage for both Gram negatives and anaerobes (e.g., Ampicillin/Gentamicin + Metronidazole).

Integration & clinical reasoning

GI Surgery & Fluid Balance: Dumping syndrome represents a massive osmotic load challenge to the small intestine, leading to profound fluid loss and electrolyte imbalance.
Infectious Disease & Local Anatomy: The deep fascial spaces of the neck (submandibular/sublingual) are critical anatomical areas; infection here can rapidly spread and compromise vital structures like the airway.
Mental Health Screening: Recognizing high-risk statements in depression is a core component of primary care medicine, requiring immediate escalation to psychiatric evaluation.

OMM / COMLEX integration

🦴

For COMLEX: know these viscerosomatics / Chapman points, but don't let OMM distract from emergent diagnosis and management.

Standard emergency management (IV fluids, broad antibiotics) takes priority over OMT in acute abdominal crises (e.g., ascending colitis or severe sepsis).
For local infections like Ludwig's Angina, the primary concern is airway compromise; while OMM/OMT principles are useful for understanding fascial planes, immediate surgical airway management trumps all other considerations.

Concept connections / cross-references

For detailed review on general GI anatomy and surgical complications: Episode 37 (or similar episode covering abdominal surgery).
For comprehensive coverage of infectious agents and local infections: Episode 12 (or similar episode covering skin/local pathology).

High-yield association table

Condition	Association	Mechanism	Clinical Significance
Ascending Colitis	Common Bile Duct Obstruction	Impaired bile flow leads to bacterial overgrowth and inflammation.	Requires urgent ERCP for stone removal and antibiotics.
Dumping Syndrome	Gastric surgery (e.g., gastrectomy)	Unregulated, rapid passage of hyperosmolar contents into the small bowel.	Leads to severe osmotic diarrhea and electrolyte wasting.
Bacterial Conjunctivitis	Contact lens use; Staphylococcus species	Local colonization/infection in moist environments.	Always suspect Pseudomonas if contact lenses are involved.
Ludwig's Angina	Submandibular/Sublingual space infection	Deep fascial plane spread of cellulitis.	High risk of airway compromise, requiring aggressive monitoring and potential intubation.

Key terms glossary

Term	Definition	Context	Example
Ascending Colitis	Inflammation of the ascending colon due to obstruction of the common bile duct.	Acute abdominal pain/biliary pathology.	Characterized by fever, RUQ pain, and jaundice.
Dumping Syndrome	Severe diarrhea following gastric surgery due to rapid transit of hyperosmolar contents.	Post-gastrectomy complications.	Patient avoids food because eating causes immediate, severe bowel movements.
Ludwig's Angina	A deep neck space infection involving the submandibular and sublingual salivary glands.	Localized cellulitis/Infection.	Requires urgent airway assessment due to potential for rapid swelling.
ERCP	Endoscopic Retrograde Cholangiopancreatography.	Diagnosis and treatment of biliary obstruction.	Used to visualize and remove stones from the common bile duct.

Study optimization

Topic	Study Approach	Priority	Resources
Acute Abdomen/Biliary	Create a flow chart: Pain -> Jaundice? -> Yes (Ascending) vs No (Cecalitis).	High	Review board vignettes focusing on bile duct anatomy and obstruction.
Local Infections	Memorize the classic presentation, key pathogens, and immediate life threat for each condition.	Medium-High	Use flashcards/mnemonics for Pseudomonas associations and Ludwig's Angina signs.
Mental Health Screening	Treat suicide screening as a mandatory step in any primary care encounter with depressive symptoms.	Highest	Practice recognizing high-risk statements (e.g., "hopeless," "no point").

Question pattern recognition

Pattern: Patient reports severe diarrhea immediately after eating. -> Dumping Syndrome, due to rapid passage of hyperosmolar contents from the stomach into the small bowel.
Pattern: Acute abdominal pain with fever and jaundice. -> Suspect Ascending Colitis (Common Bile Duct obstruction). The presence of jaundice is the key differentiator.
Pattern: Thick, purulent discharge in eyes; history of contact lens use. -> Bacterial Conjunctivitis, specifically suspect Pseudomonas aeruginosa as a common pathogen.

Test yourself

Common mistakes to avoid

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Mistake: Assuming that all acute abdominal pain requiring ERCP is due to stones. (Correction: It can also be used for diagnosis/treatment of other biliary issues).

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Mistake: Confusing the cause of jaundice in ascending colitis vs. choledocholithiasis. (Correction: Both involve CBD obstruction, but the clinical picture—fever/pain—differentiates acute infection from simple stone passage).

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Mistake: Thinking that all severe abdominal infections are appendicitis or diverticulitis. (Correction: Must consider cecalitis and ascending colitis as high-yield differentials based on bile flow status).

Common traps

⚠️

Trap 1: The most common cause of bacterial conjunctivitis is Staphylococcus , not Strep, which can lead to misdiagnosis.

⚠️

Trap 2: Assuming that the absence of jaundice rules out biliary obstruction. (Correction: While it helps differentiate cecalitis from ascending colitis, a subtle elevation in direct bilirubin may still be present).

⚠️

Trap 3: Overlooking the airway risk associated with Ludwig's Angina; never assume stability based on initial vitals.

Original transcript with highlights

Okay, welcome. My name is Devine. This is episode 408 of the Devine Interversion Podcasts. Into this podcast, we're going to be continuing the rapid review series for the US Mini step to CK and step three exams. This is going to be series 81. And if you're taking your US Mini exams anytime soon, I'm offering a 20 hour course that's going to be starting today. There's still some spots remaining. I've had many people across different spectra take the course. They would really poorly on their practice tests. They found out to be the thing that really brings them up. And there's some people that also just kind of stuck at a particular score and they need that push over the hump to get to a better score. Those are people that are all taking this course. So if you're interested, just shoot me an email through the website. And I will give you some more information. I will go from 5 to 9 p.m. Pacific Standard Time this evening. And then we'll be having the biostatistics board camp from 5 to 9 p.m. Pacific Standard Time next week Thursday, which will be the 18th of August. So if you're interested in any of these, just shoot me an email. These courses basically, they're not courses where if you're looking for like lectures that you get now. Typically, what you would get is you will get clinical scenarios because that's how your exam is going to be. And then you'll get a deep dive into pathophysiology and understanding.

And in terms of clinical scenarios, I like to put them in ways that the mbm is love to test them. Because again, you see some many in many resources, you see like this code and dry descriptions of things. The mbm is not necessarily going that those directions, the mbm is a very good at integrating things. So I will teach you how to integrate things and integrate them properly. In terms of the in terms of the course, again, many people have taking this course. They're found to be super, super helpful. I mean, I've literally had people take this course and get scores as high as the tweedies. So again, if you're interested, just shoot me an email. I'll give you some more information. Now, what if they give you a question about a person that checks off a lot of the boxes for major depressive disorder, you know, they have the sleep issues, low mood, guilt, low energy, appetite issues and all those problems. And then, you know, you see the person throw down some of these statements like, you know, life's pretty hopeless. Life's not going really well. I hit myself. I don't think this condition will ever resolve when you see stuff like that. What should you pick as an answer choice? I really hope you're picking an answer choice that involves those people being evaluated for suicide. That's something that's super, super high to know for example, you see a person that has depression on exams and you see the person makes statements of hopelessness.

You really want to pick an answer choice that involves evaluating them for suicide. Again, it looked like a benign point, but it's a super, super high point to know for the purposes of your exams. Now, what if they give you a question about a patient, they tell you that this man is 27 years old and they tell you that, oh, he had a call, he's stuck to me like three weeks ago. And he has been fine. But then over the last 24 hours, he has been having like significant, a problem in opine and you see that his blood pressure is 90 over 40. I see his temperature is 103 degrees Fahrenheit. And you notice that his outforce is massively elevated. If you see stuff like this, what should you be thinking about? Really hope you're saying, oh, the vine sounds like this guy has a sending colonitis. I remember a sending colonitis is one of these things that's rapidly fatal. You know, many people think of it as like some whatever thing that no one cares about. No, you better care about it. Sometimes a surgical service may just ignore stuff like this. Because you know, surgical services are used to callus, stectomy, colus, stectomy, colus, stectomy. But sometimes it can happen as a complication of colus, stectomy where you know, you have a retained stone. Well, this retained stone like in the case of this patient I'm describing, the retained stone goes on a clue to common bowel duct. And after including the common bowel duct, he then ultimately causes issues, right?

Because remember, he needs any colonitis is your common bowel duct that's obstructed in colus's stitis. It's your cystic duct that's obstructed. Again, these things are pretty high up to no for for exams, right? And sometimes when people see the vine, how do I differentiate it? Colusus stitis from a sending colonitis. Well, in colusus stitis, there's going to be fever and red upper quadrant pain, but there's going to be no jaundice. There's going to be no jaundice because bile is still flowing nicely through the common bowel duct. I'll tell you this as a rule. If bile is still flowing well through your hepatic duct, and your common bowel duct, you're not going to have jaundice just in general on the endemic sense. It's one of these subtle points, but it's a pretty important point to know for your tests. If bile is still flowing nicely through your hepatic duct and your common bowel duct, you're not going to have jaundice. That's just the truth. But if any of those things are obstructed, especially the common bowel duct, you're going to have jaundice. So in acute colusus stitis, it's the cystic duct that's obstructed. The common bowel duct, the hepatic duct, is not obstructed. So in those circumstances, bile is still flowing well. So you should not have jaundice. So if you see fever and just red upper quadrant pain, that's acute colusus stitis.

But if you see fever, red upper quadrant pain and jaundice, as we see in this person, and the endemic is being not always telling you jaundice, the clue to the jaundice may just be an elevation in the direct bilirubin. Obviously, if your bilirubin is elevated, you're probably going to have jaundice. So they may not give you skin findings because that'll make the question a little too easy for the unintended eye. So if you see fever and corduampin and jaundice, that's going to be ascending colonitis. But if you just see red upper quadrant pain and jaundice, no fever, that's going to be colidocoolithiasis. That's how you tease those pathologies apart. Fever, red upper quadrant pain, acute colusus stitis. Fever, red upper quadrant pain and jaundice, ascending colonitis. Red upper quadrant pain and jaundice, but no fever, no fever, that's going to be colidocoolithiasis. Obviously, colidocoolithiasis, since they have jaundice, based on the rules, I just thought to you, your, your, your common bound doctors, they think that's obstructed. So that tells you that, oh, okay, that must be the problem in colidocoolithiasis. So how do we deal with ascending colonitis? Well, ascending colonitis, you're going to go ahead and perform an ERCP. An ERCP is something that is both that diagnostic and therapeutic for ascending colonitis. You need to do an ERCP because you'll help you remove the obstructing stones.

So that very tree can drink because if that very tree doesn't drink, that person's going to be in some very big trouble. And many times these people are going to get like some super, super, super, intense IV antibiotics. Usually it's going to be a combination of ampeicillin or gen, and gen tamaisin and metronidosol. Right, you give that amp and gen. It will help you cover gram negatives and give metronidosol because it will help you cover anerobs. Because many times when people have GI tract infections, it's usually going to be gram negatives like E coli. Those are like the big things you want to cover, right? Those are the big things you want to cover. So ampeicillin, gen tamaisin and metronidosol. At the IV antibiotics, you want to throw into the pot if a person has acute colonitis. Sometimes they may not call it e-senic colonitis. Sometimes they'll just call it acute colonitis. You may notice with some of my podcasts, I love to give the other name for things because the NBM is, again, they're very big on derivative answers. This is something I've really do a lot during my review course and during my testing and strategy course. I just emphasize it that, oh, you know what? The NBM is, they love to do this thing where the words you're expecting, you're not going to see them on your exam. That's why people in the walk out of the exam, they feel like, wow, I just feel like I just get through this whole thing. No, it's not like you get through the whole thing.

The thing that happened is the words you're comfortable with, the words you were looking for, they were just not there. They were just not there. So it's just important as you're memorizing things, as you're memorizing your buzzwords. Make sure you're on this, like, oh, what are the other names for these things that I could see on the exams? Like, it sounds like a small point, but it's a very critical point. I mean, I literally, two other people, one on one, that take these exams almost every week, literally every week, multiple days a week, right? I know exactly what I'm talking about. So I'll just encourage you, as you're memorizing stuff, just make sure, right, as you're pounding, pounding, pounding through every on-key deck or any resource, make sure that, oh, you know another way this same pathology can be described. Because again, if you don't, I promise you you're kind of setting yourself up for a very shocking exam after only setting them up. So what if they give you a question about a patient and they tell you that this person has had a gastrectomy. And, you know, since this gastrectomy, this is like maybe the person had it like a few weeks ago. This person, they noticed that whenever they eat, they have like really bad mastidia area. They're not feeling great and everything is just chaotic and terrible. If you see this, what should you be thinking about? I really hope you think about dumping syndrome, right? Dumping syndrome. Dumping, dumping, dumping syndrome.

Dumping syndrome is something that arises after gastric surgery. It's a complication of gastric surgery. So it's going to be a person, you know, the gastric surgery of some sort. And then you notice that, wow, whenever they eat, they just poop big time. They just have this mastid, mastid, mastidia area. So these people, they start avoiding food because they know that when they eat, they're going to be fed up to the restroom, right? That's dumping syndrome. And typically, the thing that largely causes dumping syndrome is the unregulated flow of food from the stomach to the small intestine, right? Just this unregulated food flow. It just goes to the small intestine from the stomach. And if the small, I mean, from the stomach to the small intestine, if the small intestine sees all that food bone, just showing up very quickly, all of a sudden, then that thing can cause an osmotic pool of fluid. And that osmotic fluid pool can cause a person to have a lot of diarrhea, right? And cause a person to have a lot of diarrhea. That's pretty high up to no for, for example. So that's dumping syndrome. That's dumping syndrome. Now, what if they give you a question about a patient that, oh, for the last four days, they've been having this thick, pureland discharge from their eyes. Thick, thick, thick, pureland discharge. They're like, I don't feel great in the mornings when I wake up, all those postures are homolites. And I try to wipe it off and don't.

I see this post again a few minutes later. If you see this, I'll really hope you're thinking about bacterial conjunctivitis. Really, really hope you're thinking about bacterial conjunctivitis. Basically, you're going to see a lot of post, post, post, post, post, post, post, and usually it's caused by staphorias, right? Literally, the most common cause of bacterial conjunctivitis is going to be staphorias. Now, one thing I'll just say, if they give you, if you see any whiff of a person using contact lenses, and they're asking for the cause of their conjunctivitis, I'd really, really hope you're saying, oh, divine. This sounds an awful lot like the pseudomonas. So the monocausic certain specialized infections that I feel like people don't pay attention to on exams, right? So the monoccan cause bacterial conjunctivitis and people that use contact lenses, especially if you've been a contact lens user for a prolonged period of time. So the monoccan cause of a tightest external, right? It is the most common cause of a tightest external. Remember, a tightest external, many times we're going to treat it with otake drops, like acetic acid drops, or you can even use for when you're on ear drops. And things like that, right? And remember, so the monoclobs to cause infection in people that have cystic fibrosis, especially the older people that have cystic fibrosis, are people over the age of 20, so the monoclobs to cause pneumonia in those people, right?

And then don't forget, so the monoccan cause osteomyelitis as well, especially when it involves a nail, right? Like a sharp foreign object, think, think, think, so the monos cause in a osteomyelitis in those circumstances. And I'm telling you, people that have diabetics, diabetics, they love, love, love to get osteomyelitis. I mean, so the monos related infections, right? So that's just all things you want to keep in mind, which is to the monos for, for example, especially people that are neutropinic, they tend to get some very serious so the monos infections, right? They tend to get some very, very, very serious so the monos infections. And then what if they give you a question about a 30-year-old guy, and he tells you that, you know, he had an ear infection like a few weeks ago. But then over the last 24 hours, he has been having very severe pain under his jaw, and, you know, he has also been having a lot of severe pain just under his ear. If you see that, what are you thinking about? Well, I really hope you're saying how to find. It sounds like this person has what we call Lordwig Angina, Lordwig Angina, LUD, WIG, Lordwig Angina. Basically, it's really bad cellulitis that involves that area around your submandibula and your sublegal glands. It's pretty high, you know, that these things can actually cause people's earliest to be obstructed. So don't be surprised that endotracheal intubation may be the next step in management for these people on exams.

Remember, obviously, that's also what you're going to do for a person that has a big lotitis, right? That's something you're also going to do for a person that has a big lotitis. Again, that's pretty high, you know, to know, to know, for exams. Okay. Now, what if they give you a question about a, what if they give you a question about a patient, and they tell you that this patient is 36 years old, and she just had a hysterectomy because she has had like really bad lyomaiomas that have been complicated about a lot of bleeding. And then they tell you like four hours after the surgery. This person has been having fevers, what that surgical incision looks fine. It doesn't appear to be draining any parts or things like that. And then they tell you that all the breath sounds are mildly decreased.

But other than that, they just tell you that about this, they keep going on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on and on

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Practice questions — USMLE style

Question 1 — Gastroenterology

A 27-year-old man presents to the emergency department with a history of right upper quadrant (RUQ) abdominal pain and jaundice that began over the last few days. He has no reported fever or chills, but his physical exam reveals scleral icterus and mild RUQ tenderness. Laboratory studies show elevated total bilirubin and alkaline phosphatase. Based on this presentation, which diagnosis is most likely?

A) Acute cholecystitis
B) Ascending cholangitis
C) Choledocholithiasis
D) Gallstone pancreatitis

Answer: C. The patient presents with RUQ pain and jaundice but lacks fever (Charcot's triad requires fever, jaundice, and RUQ pain). In the absence of systemic signs of infection (fever/chills), the combination of RUQ pain and jaundice strongly suggests an obstruction in the common bile duct (choledocholithiasis) causing biliary stasis. Acute cholecystitis typically presents with localized inflammation without significant jaundice unless the stone has migrated into the common bile duct, and ascending cholangitis requires fever along with the signs of obstruction.

Question 2 — Surgery

A 65-year-old woman undergoes a laparoscopic gastrectomy for gastric adenocarcinoma. Three weeks post-surgery, she begins experiencing severe diarrhea, particularly after consuming meals. She reports that her stools are voluminous and watery, leading her to avoid eating out of fear of frequent bowel movements. The physician suspects an anastomotic leak or another complication related to the surgery. What is the most likely diagnosis?

A) Irritable Bowel Syndrome (IBS)
B) Dumping syndrome
C) SBO obstruction
D) Pseudomembranous colitis

Answer: B. Dumping syndrome is a common, high-yield complication following gastric resection or bypass. It results from the rapid, unregulated passage of hyperosmolar contents (food) from the stomach into the small intestine. This sudden influx of fluid and nutrients causes an osmotic shift, drawing large amounts of water into the intestinal lumen, leading to severe diarrhea and abdominal cramping shortly after eating.

Question 3 — Psychiatry

A 45-year-old woman is seen in the primary care clinic for evaluation of persistent low mood, fatigue, and difficulty concentrating over the past six months. She reports changes in her sleep patterns (insomnia) and has lost interest in hobbies she once enjoyed. During the history taking, she makes several statements, including, "I feel like a burden to everyone I know," and "There is no point in continuing this; life's pretty hopeless." Which of the following actions is the most critical immediate priority for the clinician?

A) Prescribing an SSRI agent immediately
B) Referring the patient to physical therapy for fatigue management
C) Performing a comprehensive suicide risk assessment
D) Educating the patient on dietary changes to improve mood

Answer: C. While the patient meets criteria for Major Depressive Disorder (MDD), the statements of hopelessness and worthlessness ("I feel like a burden," "life's pretty hopeless") are critical warning signs. In any patient presenting with depressive symptoms, the absolute highest priority is always evaluating for suicidal ideation, intent, and plan, as this represents an immediate threat to life.

Question 4 — Infectious Disease

A 30-year-old man presents with severe pain under his jaw (submandibular region) and radiating pain toward his ear. He reports a history of a recent mild otitis media several weeks prior. Physical examination reveals marked swelling in the submandibular space, and the patient appears acutely ill. Which diagnosis is most strongly suggested by this clinical picture?

A) Cellulitis
B) Ludwig angina
C) Deep neck abscess
D) Osteomyelitis of the mandible

Answer: B. Ludwig angina is a rapidly spreading cellulitis involving the floor of the mouth and submandibular/sublingual spaces. It is characterized by severe pain, swelling, and potential airway compromise due to the rapid spread of infection in this confined space. Because it can quickly lead to airway obstruction, it requires aggressive management, often including emergent intubation, making it a critical high-yield diagnosis for board exams.

Quick fire review

What is the classic triad of symptoms seen in ascending cholangitis?

Fever, right upper quadrant (RUQ) abdominal pain, and jaundice.

If a patient has RUQ pain and fever but no jaundice, what condition should you suspect?

Acute cholecystitis.

What is the most common cause of bacterial conjunctivitis?

Staphylococcus species.

In which specific population or scenario should Pseudomonas infection be highly suspected in a patient with conjunctivitis?

Patients who use contact lenses, especially for prolonged periods.

What are the three components of IV antibiotics typically used to treat acute cholangitis?

A combination covering Gram-negatives (e.g., Ampicillin/Gentamicin) and anaerobes (Metronidazole).

What is the primary mechanism leading to diarrhea in dumping syndrome?

Unregulated, rapid flow of hyperosmolar contents from the stomach into the small intestine, causing an osmotic load.

What clinical signs are highly suggestive of ascending cholangitis?

The triad of fever, RUQ pain, and jaundice.

If a patient has acute cholecystitis, what is expected regarding bile flow and jaundice?

Bile is still flowing nicely through the common bile duct (CBD) and hepatic duct; therefore, jaundice should be absent.

What specific type of conjunctivitis must be considered in contact lens wearers due to high risk of infection?

Pseudomonas aeruginosa.

What condition involves severe cellulitis around the submandibular and sublingual glands, often following an ear infection, requiring consideration for airway compromise?

Lordwig's Angina.

After a gastrectomy, what complication results from the unregulated flow of stomach contents into the small intestine, causing osmotic diarrhea?

Dumping syndrome.

What is the key difference in jaundice presentation between acute cholecystitis and ascending cholangitis?

Acute cholecystitis typically lacks jaundice because bile flow through the CBD remains intact; ascending cholangitis involves obstruction leading to jaundice.

Quick recall / Anki-style questions