The author analyzes the clinical data and paraclinical characteristics of patients with paraneoplastic bullous dermatoses, followed up at the Research Institute of Skin and Sexually Transmitted Diseases in the town of Gorki since 1980. Clinical features of Duhring's paraneoplastic dermatoses were detected, consisting in dissemination of the process with involvement of facial skin and with essential itching. Paraclinical characteristics are as follows: neither eosinophils, nor acantholytic cells are detectable in the vesicular contents, Jadassohn's test is negative, histomorphologic examination shows intraepidermal localization of the vesicle. In paraneoplastic pemphigus involvement of the mucosae alone was recorded, and the painful syndrome whose severity did not correlate with the depth of the pathologic foci; corticosteroid therapy has proved ineffective. The author recommends thorough examinations of patients with bullous dermatoses if they present with the aforesaid clinical and paraclinical characteristics.