<prompt> Max. Joseph;s space is a histopatho-logical feature of -Psoriasis vulgarisLichen planusPityriasis roseaParapsoriasis  <response>: 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 