<prompt> A 50 years old man has a 2 year history of facial bullae oral ulcers. Microscopic smear from skin lesions is most likely to disclose a Tzanck cellsb Acantholytic cellsc Necrosisd Koilocytosiscdabac  <response>: Facial bulla and oral ulcers mucosal involvement in a 50 years man suggest the diagnosis ofpemphigus vulgaris. The smear from the lesions will show ancantholytic cells also referred to as Tzank cells, which are separated keratinocytes. 