A 26 year male came with hypopigmented macule over chest with scratch sign positive. Diagnosis is:
Hypopigmented patch over chest and trunk with fine scaling and scratch sign positive (i.e appearance of scales on scratching ) is suggestive of Pityriasis versicolor which is a fungal intection caused by Malassezia.
Hansen's disease
PKDL
Pityriasis alba
Pityriasis versicolor