Chest imaging: pulmonary sequestration: 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 · Chest imaging: pulmonary sequestration

Sample item

A young man with recurrent left basal pneumonia has a persistent mass in the posterior basal segment of the left lower lobe. CT angiography shows an artery arising from the descending thoracic aorta supplying it. What is the diagnosis?

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

The answer and the reasoning

C. Pulmonary sequestration

A sequestration is nonfunctioning lung tissue without normal bronchial connection and with a systemic arterial supply, usually from the descending aorta. It causes recurrent infection in the lower lobes. Knowing the feeding vessel is essential before resection.

Option by option

  • A. Hydatid cyst

    A hydatid cyst has no systemic arterial supply.

  • B. Pulmonary arteriovenous malformation

    A pulmonary AVM is fed by the pulmonary artery.

  • C. Pulmonary sequestration (correct)

    Correct. Systemic arterial supply to a basal mass defines sequestration.

  • D. Bronchogenic carcinoma

    A carcinoma is not supplied by an anomalous aortic branch in a young patient with recurrent infection.

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.

More Radiology questions

Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is C, Pulmonary sequestration. A sequestration is nonfunctioning lung tissue without normal bronchial connection and with a systemic arterial supply, usually from the descending aorta.

Why is "Hydatid cyst" not the answer?

A hydatid cyst has no systemic arterial supply.

Why is "Pulmonary arteriovenous malformation" not the answer?

A pulmonary AVM is fed by the pulmonary artery.

Why is "Bronchogenic carcinoma" not the answer?

A carcinoma is not supplied by an anomalous aortic branch in a young patient with recurrent infection.

What concept does this question test?

It tests Chest imaging: pulmonary sequestration in Radiology. It causes recurrent infection in the lower lobes. Knowing the feeding vessel is essential before resection.

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 Chest imaging: pulmonary sequestration?

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.