Pigmentary disorders: practice question

A Dermatology 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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Dermatology · Pigmentary disorders

Sample item

Which disorder causes sharply demarcated depigmented patches that fluoresce under Wood lamp?

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

The answer and the reasoning

D. Vitiligo

Vitiligo reflects melanocyte loss and produces sharply defined depigmented patches that show bright accentuation under Wood lamp examination.

Option by option

  • A. Tinea versicolor only

    Tinea versicolor is fungal and may show fine scale.

  • B. Post-inflammatory hyperpigmentation

    Post-inflammatory change usually darkens rather than depigments skin.

  • C. Melasma

    Melasma produces hyperpigmented facial patches.

  • D. Vitiligo (correct)

    Correct: Wood lamp accentuates depigmentation in vitiligo.

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 Dermatology questions

Questions about this Dermatology question

What is the answer to this Dermatology question?

The best answer is D, Vitiligo. Vitiligo reflects melanocyte loss and produces sharply defined depigmented patches that show bright accentuation under Wood lamp examination.

Why is "Tinea versicolor only" not the answer?

Tinea versicolor is fungal and may show fine scale.

Why is "Post-inflammatory hyperpigmentation" not the answer?

Post-inflammatory change usually darkens rather than depigments skin.

Why is "Melasma" not the answer?

Melasma produces hyperpigmented facial patches.

What concept does this question test?

It tests Pigmentary disorders in Dermatology. The correct option holds because: Correct: Wood lamp accentuates depigmentation in vitiligo.

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 Pigmentary disorders?

Learn each condition by its primary lesion, site and signature sign. Then use the flashcards and the other Dermatology 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.