[On the clinical aspects and ultrastructure of bullous pemphigoid (parapemphigus) of the oral mucous membrane (author's transl)].

Bullous changes in the oral mucosa are often the first signs of a general dermatological disease. Successful diagnosis of such diseases is largely dependent upon the use of complex laboratory methods. Clinical and ultrastructural changes are described and discussed with particular reference to a case of parapemphigus. Atypical intracellular vacuolation and marked acantholysis observed in electron micrographs is interpreted as a secondary phenomenon of direct blistering.