Papulosquamous: large plaque parapsoriasis: 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 · Papulosquamous: large plaque parapsoriasis

Sample item

A 55-year-old man has persistent, slightly atrophic, fine-wrinkled patches over 10 cm on the buttocks and thighs for years. What is the clinical concern?

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

The answer and the reasoning

A. It may progress to mycosis fungoides, so serial biopsies are advised

Large plaque parapsoriasis, with patches over 5 cm and atrophic wrinkled surface, is regarded as an early patch stage of cutaneous T-cell lymphoma in many cases. Persistent or changing lesions warrant rebiopsy. Small plaque parapsoriasis is typically benign.

Option by option

  • A. It may progress to mycosis fungoides, so serial biopsies are advised (correct)

    Correct. Large plaque disease can evolve to mycosis fungoides.

  • B. It confers a risk of melanoma

    Melanoma risk is not increased in parapsoriasis.

  • C. It is a precursor to basal cell carcinoma

    Basal cell carcinoma is not linked to parapsoriasis.

  • D. It will transform into pemphigus

    Pemphigus is an autoimmune blistering disease unrelated to parapsoriasis.

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 Dermatology question

What is the answer to this Dermatology question?

The best answer is A, It may progress to mycosis fungoides, so serial biopsies are advised. Large plaque parapsoriasis, with patches over 5 cm and atrophic wrinkled surface, is regarded as an early patch stage of cutaneous T-cell lymphoma in many cases.

Why is "It confers a risk of melanoma" not the answer?

Melanoma risk is not increased in parapsoriasis.

Why is "It is a precursor to basal cell carcinoma" not the answer?

Basal cell carcinoma is not linked to parapsoriasis.

Why is "It will transform into pemphigus" not the answer?

Pemphigus is an autoimmune blistering disease unrelated to parapsoriasis.

What concept does this question test?

It tests Papulosquamous: large plaque parapsoriasis in Dermatology. Persistent or changing lesions warrant rebiopsy. Small plaque parapsoriasis is typically benign.

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 Papulosquamous: large plaque parapsoriasis?

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.