[Studies on primary hyperparathyroidism with particular reference to osteal manifestations in the maxillofacial region (author's transl)].

After a brief review of the pathophysiological relationships determined for primary hyperparathyroidism, osteal manifestations of this condition are discussed. The importance of a histological demonstration of pathognomonic dissecting fibro-osteoclasia in iliac crest biopsy and in the marginal region of so-called brown tumors is pointed out in connection with results obtained by diagnosis in general and differential diagnosis in particular. The occurrence in the maxillofacial region of Recklinghausen's generalized fibrous osteodystrophy is described with reference to a particular case history, and the diagnostic value of clinical and roentgenological, laboratory-diagnosis and histological criteria is determined.