Abdominal and GI imaging: walled-off necrosis: practice question

A Radiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Radiology · Abdominal and GI imaging: walled-off necrosis

Sample item

Six weeks after an attack of necrotising pancreatitis, CT shows a peripancreatic collection with an enhancing wall and heterogeneous content containing non-liquid components. Which entity is this?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

C. Walled-off necrosis

In the revised Atlanta classification, a mature encapsulated collection of necrosis after about four weeks is walled-off necrosis. The solid debris separates it from a pseudocyst, and MRI or endoscopic ultrasound shows the debris better than CT.

Option by option

  • A. Acute peripancreatic fluid collection

    An acute peripancreatic fluid collection occurs early in oedematous pancreatitis, has no wall and no necrosis.

  • B. Acute necrotic collection

    An acute necrotic collection is within four weeks and has no defined wall.

  • C. Walled-off necrosis (correct)

    Correct. A mature wall around solid and liquid necrotic content beyond four weeks is walled-off necrosis.

  • D. Pancreatic pseudocyst

    A pseudocyst is a purely fluid collection without solid components.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is C, Walled-off necrosis. In the revised Atlanta classification, a mature encapsulated collection of necrosis after about four weeks is walled-off necrosis.

Why is "Acute peripancreatic fluid collection" not the answer?

An acute peripancreatic fluid collection occurs early in oedematous pancreatitis, has no wall and no necrosis.

Why is "Acute necrotic collection" not the answer?

An acute necrotic collection is within four weeks and has no defined wall.

Why is "Pancreatic pseudocyst" not the answer?

A pseudocyst is a purely fluid collection without solid components.

What concept does this question test?

It tests Abdominal and GI imaging: walled-off necrosis in Radiology. The solid debris separates it from a pseudocyst, and MRI or endoscopic ultrasound shows the debris better than CT.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Abdominal and GI imaging: walled-off necrosis?

Learn signs with the image, and the disease they point to. Then use the flashcards and the other Radiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.