<prompt> Acantholytic cells in blister cavity ?PemphigusBullous pemphigoidEpidermolysisbullosaDermatitis herpetiformis  <response>: Ans. is a i.e., Pemphigus Impoant Tzank smear finding of bullous lesions VZV and HSV infection -- Multinucleated giant cells Pemphigus -- Acontholytic cells Pemphigoid -- Predominantly eosinophils 