Urology: calcium oxalate stone prevention: 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: calcium oxalate stone prevention

Sample item

A recurrent stone former has calcium oxalate stones, low urinary citrate and normal urinary calcium. Which agent is most appropriate?

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

The answer and the reasoning

A. Potassium citrate

Citrate inhibits calcium stone crystallisation, and potassium citrate corrects hypocitraturia. Thiazides are selected for hypercalciuria. Normal dietary calcium, high fluid intake and low sodium are advised.

Option by option

  • A. Potassium citrate (correct)

    Correct. Citrate replacement addresses hypocitraturia.

  • B. Cellulose phosphate

    Cellulose phosphate is rarely used.

  • C. Allopurinol

    Allopurinol targets hyperuricosuria.

  • D. Hydrochlorothiazide

    Thiazides are for high urinary calcium.

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 A, Potassium citrate. Citrate inhibits calcium stone crystallisation, and potassium citrate corrects hypocitraturia.

Why is "Cellulose phosphate" not the answer?

Cellulose phosphate is rarely used.

Why is "Allopurinol" not the answer?

Allopurinol targets hyperuricosuria.

Why is "Hydrochlorothiazide" not the answer?

Thiazides are for high urinary calcium.

What concept does this question test?

It tests Urology: calcium oxalate stone prevention in General Surgery. Thiazides are selected for hypercalciuria. Normal dietary calcium, high fluid intake and low sodium are advised.

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: calcium oxalate stone prevention?

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.