Obstetric imaging: polyhydramnios: 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 · Obstetric imaging: polyhydramnios

Sample item

A diabetic woman at 32 weeks has a fundal height greater than dates. Ultrasound shows an amniotic fluid index of 28 cm. Which fetal anomaly should be specifically looked for?

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

The answer and the reasoning

B. Oesophageal atresia or other gastrointestinal obstruction

Polyhydramnios occurs with maternal diabetes and with fetal conditions that impair swallowing or cause high urine output, such as oesophageal atresia, duodenal atresia and neurological disorders. Renal anomalies usually cause oligohydramnios.

Option by option

  • A. Posterior urethral valves

    Posterior urethral valves cause oligohydramnios.

  • B. Oesophageal atresia or other gastrointestinal obstruction (correct)

    Correct. Swallowing impairment from gut atresia causes polyhydramnios.

  • C. Renal agenesis

    Renal agenesis causes oligohydramnios.

  • D. Bilateral multicystic kidneys

    Bilateral multicystic kidneys reduce urine output and fluid.

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 B, Oesophageal atresia or other gastrointestinal obstruction. Polyhydramnios occurs with maternal diabetes and with fetal conditions that impair swallowing or cause high urine output, such as oesophageal atresia, duodenal atresia and neurological disorders.

Why is "Posterior urethral valves" not the answer?

Posterior urethral valves cause oligohydramnios.

Why is "Renal agenesis" not the answer?

Renal agenesis causes oligohydramnios.

Why is "Bilateral multicystic kidneys" not the answer?

Bilateral multicystic kidneys reduce urine output and fluid.

What concept does this question test?

It tests Obstetric imaging: polyhydramnios in Radiology. Renal anomalies usually cause oligohydramnios.

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 Obstetric imaging: polyhydramnios?

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.