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Dermatology

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Developmental Abnormalities

Question
11 out of 44
 

A 24 year old man had multiple, small hypopigmented macules on the upper chest and back for the last three months. The macules were circular, arranged around follicles and many had coalesced to form large sheets. The surface of the macules showed fine scaling. He had similar lesions one year age which subsided with treatment. The most appropriate investigation to confirm the diagnosis is - (AIPG 2011)



A Potassium hydroxide preparation of scales

B Slit skin smear from discrete macules

C Tzanck test

D Skin biopsy of coalesced macules

Ans. A
Potassium hydroxide preparation of scales

a. Information in this question are :-

i) Adult patient (24 yrs)

ii) Multiple small hypopigmented macules

iii) On chest and back

iv) Macules had started around follicle and then coalesced

v) Fine scales

vi) Recurrent after treatment

b. The clinical diagnosis is P. versicolor which can be confirmed by examination of scales as wet mounts after treatment with 10% KOH.

Developmental Abnormalities Flashcard List

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