Max. Joseph&;s space is a histopatho-logical feature of -: (A) Psoriasis vulgaris, (B) Lichen planus, (C) Pityriasis rosea, (D) Parapsoriasis
Answer is B. Lichen planus in histopathology shows thickened granular layer , saw toothing of rete ridges , basal cell degeneration ( leading to Max Joseph s spaces and colloid/ Civatte body formation) and a band like upper dermal infiltrate of lymphocytes. IADVL TEXTBOOK OF DERMATOLOGY PAGE 1070