[Familial gingival fibromatosis: report of a case].

One family of familial gingival fibromatosis was presented. Case 1 is an 11 years old girl. Gingival fibromatosis was noted by delayed eruption of permanent teeth. Fibromatosis was seen in whole gingiva and lower 1/2 to 1/3 of the tooth crowns was covered. Gingivectomy was performed. Case 2 was 42 years old man, who was father of case 1. Firstly gingival swelling was noted at the age of 10 years. He had operations of gingivectomy at the age of 28 years. It recurred and fibromatosis was seen in whole gingiva and lower 1/2 to 1/3 of the tooth crowns was covered. Cytogenetically no abnormality was seen in the chromosomes of both cases. Reported cases of familial and non-familial gingival fibromatosis in Japan were reviewed.