Just like the actual exam

Aligned with the National Board of Medical Examiners format. Authored & peer-reviewed by faculty, clinicians, and clerkship directors.

Each question is written to resemble the format and topics on the exam, meaning you won’t see any negatively phrased questions, no “all of the following except,” no “A and B”…you know what we mean. Most importantly, all questions include selective distractors (incorrect answer choices), which will help you think critically.

  • Must address important content
  • Must be well structured


A 74-year-old man is brought to the ED from a psychiatric facility. He has had massive abdominal distension for 2 days, with mild abdominal pain. He has never had any abdominal surgeries and has been obstipated for 12 hours. He has no hernias on exam. The patient is familiar to you and has been treated nonoperatively once before for a similar clinical presentation. Which of the following combinations correctly matches the imaging modality with the expected finding for this patient?

A Abdominal X-ray and free air below the diaphragm
B Abdominal X-ray and markedly dilated sigmoid colon
C CT of abdomen and pelvis with oral contrast and free air below the diaphragm
D Gastrografin small bowel follow-through and transition point

This patient most likely has experienced repeated bouts of colonic volvulus with intermittent abdominal pain, distension, and obstruction. Colonic volvulus occurs when the bowel becomes twisted along its mesenteric axis, resulting in complete obstruction of its lumen, obstipation, pain, and massive rapid-onset distension. There is also a concomitant risk of bowel ischemia. Sigmoid volvulus most commonly occurs between 60 and 80 years of age and accounts for two-thirds of all cases of colonic volvulus. Radiographic findings often lead to a prompt diagnosis. The abdominal X-ray would most likely show a massively dilated sigmoid colon. This dilated segment of sigmoid colon is sometimes described as a bent inner tube.

Abdominal X-ray and free air below the diaphragm (A) is the radiographic finding expected after bowel perforation. The free air under the diaphragm is most clearly seen between the liver and the diaphragm. Patients typically present with peritonitis. Although free air beneath the diaphragm is expected with bowel perforation, there is a rare instance in which free air beneath the diaphragm is actually colon between the liver and diaphragm and is a benign condition. This is referred to as Chilaiditi sign. CT of abdomen and pelvis with oral contrast and free air below the diaphragm (C) would be expected with bowel perforation, but this is not the correct combination in this patient due to his nontender abdomen. Gastrografin small bowel follow-through and transition point (D) is a radiographic test best used to diagnose a small bowel obstruction. The acute and recurrent presentation of symptoms, lack of previous abdominal surgery, and negative hernia exam make a small bowel obstruction less likely than colonic volvulus. Small bowel follow-through is excellent for demonstrating an obstruction, and a visualized transition point defines a complete small bowel obstruction.


Written with a purpose

Understanding why an answer choice is incorrect is just as important as knowing why one is correct. That’s why every Rosh Review question includes detailed explanations for the correct and incorrect answer choices. These comprehensive summaries link the most important components of a topic—from risk factors to diagnostics and treatment—giving you the context to build relationships between them.

  • Created for optimal learning and recall
  • Help reinforce your knowledge
  • Focus on the essential information


Created to enhance learning

Custom illustrations and tables help further clarify the core concepts. When information is presented visually, you can focus on meaning, easily reorganize and group similar ideas, and make better use of your memory.

sigmoid volvulus

Powerful Analytics

Track progress, performance, & predictions

Your personal analytics allow you to see your progress at all times, so you can create an efficient and effective learning strategy and stay on pace with your plan.

Focus your learning

Deep insights to determine your strengths and weaknesses so you can spend your time on the subjects that matter.

Compare with your peers (chart)

Compare with your peers

Discover how your answer choices align with those selected by learners across the country.

Find out your probability of passing

Using data generated by previous users, your Qbank gives a prediction of how likely you are to pass your exam.

One Step Further

Taking your learning to the next level

After each explanation is a straightforward question with a simple, memorizable answer that reinforces the corresponding topic.

  • Strengthens your knowledge
  • Stands alone from the main explanation so you’re not rereading content

Q: Does sigmoid volvulus have a higher rate of occurrence in men, women, or neither?

Reveal Answer

A: Neither.

Sigmoid Volvulus

  • Older bedridden patient or patient with psychiatric/neurological history
  • History of constipation
  • Sigmoidoscopy

Rapid Review

Keeping things simple

These bulleted reviews focus on condensed, high-yield concepts about the main topic, from patient presentation to preferred management.

  • Cover the fundamentals in one list
  • Allow you to quickly scan the must-know information
I focused on the Rosh Review Qbank before my shelf exam, and I scored the highest in my clerkship. All I have to say is...your content is amazing.


Get a little more clarification

Where can I find free shelf exam practice questions?
You can access free practice questions with a free trial for a Shelf Exam Qbank—no billing information required. The free trial includes practice questions that align with topics found on the shelf exam and include comprehensive answer explanations and beautiful teaching images.

After practicing with these questions, if you decide you're ready for hundreds of additional questions to help you confidently prep for the shelf exam, you can easily upgrade to a full Qbank subscription.
How do I get started?
Whether you have a trial account or you purchased a subscription, access Rosh Review by logging in at To access the Qbank, go to the Create Exam tab to begin making and taking exams made up of questions from the Qbank. You can find any boost exams under the My ExamsBoost Exam tab. Once you've completed and submitted a few exams, you can see your statistics under the Performance Analysis tab.
Who writes the questions and explanations for the medical student Qbanks?
The finest people around! Question writers are board-certified clinicians who have all performed well on their certification exams. Answer explanations are derived from the specialty’s authoritative resources with some personal input to simplify the material and synthesize it for greatest comprehension and recall.
Do you offer a free trial?
Absolutely! You can try out a number of sample questions in the actual app by creating a free account (no billing information required—we promise). You will get a fully functional account, forever, with a limited number of questions. If you love it, you can easily purchase a full content subscription. You won't be charged at any point during your trial until you make a purchase.

Get Started For Free

No Credit Card Required
Get Free Access

Buy Now

View Products and Pricing
View Pricing