Pigmentary: halo naevus: 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: halo naevus

Sample item

A teenager has a pigmented naevus surrounded by a rim of depigmentation, and the naevus later regresses. What should be examined for?

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

The answer and the reasoning

C. Vitiligo elsewhere

Halo naevus (Sutton naevus) results from immune attack on melanocytes and is associated with vitiligo in a proportion of patients. Examination of the rest of the skin and, in adults, the scalp for melanoma is advised. Typical halo naevi regress with time.

Option by option

  • A. Peutz-Jeghers syndrome

    Peutz-Jeghers gives mucosal lentigines.

  • B. Albinism

    Albinism is a generalised hypopigmentation disorder.

  • C. Vitiligo elsewhere (correct)

    Correct. Halo naevus is associated with vitiligo.

  • D. Neurofibromatosis

    NF1 gives café-au-lait spots and neurofibromas.

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 C, Vitiligo elsewhere. Halo naevus (Sutton naevus) results from immune attack on melanocytes and is associated with vitiligo in a proportion of patients.

Why is "Peutz-Jeghers syndrome" not the answer?

Peutz-Jeghers gives mucosal lentigines.

Why is "Albinism" not the answer?

Albinism is a generalised hypopigmentation disorder.

Why is "Neurofibromatosis" not the answer?

NF1 gives café-au-lait spots and neurofibromas.

What concept does this question test?

It tests Pigmentary: halo naevus in Dermatology. Examination of the rest of the skin and, in adults, the scalp for melanoma is advised. Typical halo naevi regress with time.

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: halo naevus?

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.