Recently, not only the multiple endocrine adenomatosis (MEN)-associated type but also the type which can be isolated from MEN syndrome have been widely accepted in the classification of familial hyperparathyroidism. Analysis of gene markers specific to MEN syndrome contributed markedly to the establishment of isolated familial hyperparathyroidism. We attempted an analysis of 15 pedigrees in the report of familial hyperparathyroidism in which MEN syndrome was actively ruled out. In 7 pedigrees, adenoma alone was seen while in 2 pedigrees was hyperplasia alone seen. In 6 pedigrees parathyroid carcinoma was also admitted (other members of the pedigree were affected with parathyroid adenoma or hyperplasia). There were 5 pedigrees in which cementifying fibroma or ossifying fibroma of the jaw was associated with familial hyperparathyroidism. The association of parathyroid carcinomas or benign jaw tumors should be paid attention.
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