Urology: pelviureteric junction obstruction: practice question

A General Surgery 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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General Surgery · Urology: pelviureteric junction obstruction

Sample item

A 6-year-old has intermittent loin pain and antenatally detected hydronephrosis. Diuretic renography (MAG3) shows delayed drainage with split function of 35 percent on the affected side. What is the operation of choice?

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

The answer and the reasoning

C. Anderson-Hynes dismembered pyeloplasty

PUJ obstruction is the commonest cause of antenatal hydronephrosis. A diuretic renogram with MAG3 or DTPA shows obstructive drainage and split function. Dismembered pyeloplasty excises the narrow segment and reanastomoses the renal pelvis to the ureter.

Option by option

  • A. Nephrectomy

    Function of 35 percent is salvageable.

  • B. Endoscopic valve ablation

    Valves are in the urethra.

  • C. Anderson-Hynes dismembered pyeloplasty (correct)

    Correct. Pyeloplasty relieves PUJ obstruction.

  • D. Ureteric reimplantation

    Reimplantation treats vesicoureteric junction problems.

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 General Surgery question

What is the answer to this General Surgery question?

The best answer is C, Anderson-Hynes dismembered pyeloplasty. PUJ obstruction is the commonest cause of antenatal hydronephrosis.

Why is "Nephrectomy" not the answer?

Function of 35 percent is salvageable.

Why is "Endoscopic valve ablation" not the answer?

Valves are in the urethra.

Why is "Ureteric reimplantation" not the answer?

Reimplantation treats vesicoureteric junction problems.

What concept does this question test?

It tests Urology: pelviureteric junction obstruction in General Surgery. A diuretic renogram with MAG3 or DTPA shows obstructive drainage and split function. Dismembered pyeloplasty excises the narrow segment and reanastomoses the renal pelvis to the ureter.

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 Urology: pelviureteric junction obstruction?

Learn classic signs and eponyms alongside what they diagnose. Then use the flashcards and the other General Surgery 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.