Nuclear medicine: renal scintigraphy: 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 · Nuclear medicine: renal scintigraphy

Sample item

A child with antenatal hydronephrosis needs assessment of obstruction and split renal function. Which diuretic renography agent is preferred?

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

The answer and the reasoning

A. Tc-99m MAG3

MAG3 is secreted by the proximal tubule and provides good-quality images even in poor function, and with furosemide it assesses drainage. DMSA is a static cortical agent. DTPA is filtered and is used for GFR measurement.

Option by option

  • A. Tc-99m MAG3 (correct)

    Correct. MAG3 diuretic renography assesses obstruction and function.

  • B. Tc-99m DMSA

    DMSA assesses cortical scars and differential function but not drainage.

  • C. Tc-99m MDP

    MDP is a bone agent.

  • D. Tc-99m sulphur colloid

    Sulphur colloid is a reticuloendothelial agent.

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 A, Tc-99m MAG3. MAG3 is secreted by the proximal tubule and provides good-quality images even in poor function, and with furosemide it assesses drainage.

Why is "Tc-99m DMSA" not the answer?

DMSA assesses cortical scars and differential function but not drainage.

Why is "Tc-99m MDP" not the answer?

MDP is a bone agent.

Why is "Tc-99m sulphur colloid" not the answer?

Sulphur colloid is a reticuloendothelial agent.

What concept does this question test?

It tests Nuclear medicine: renal scintigraphy in Radiology. DMSA is a static cortical agent. DTPA is filtered and is used for GFR measurement.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. 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 Nuclear medicine: renal scintigraphy?

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.