Mucous lesions are seen in :

D i.e. PemphigusMucosa involvement is seen in Behcet's syndrome, reactive ahritis (Reiter's syndrome), Peutz Jegher syndromeQ, erythema multiforme major, Steven Johnson syndrome, TEN, lichen planusQ, lupus erythematousus, leprosy, measles (Koplik spots) Q, Fordyce spot & disease, syphilis (congenital and secondary), inflammatory bowel disease, acute HIV infection and pemphigus vulgarisQ.Pemphigus folicaeus and bullous pemphigoid do not involve mucous membraneQ. However, * ocular/oral/scarring/cicatrical/benign mucosal/or mucous membrane - pemphigoid or bursting perry pemphigoid involve mucosa.