Abnormality of the gingiva Gingival fibromatosis Idiopathic gingival hyperplasia The presence of fibrosis of the gingiva. UMLS:C0016049 SNOMEDCT_US:58569000 Gingival fibroma Gingival fibrous nodules SNOMEDCT_US:109620006 Hereditary gingival fibromatosis UMLS:C4280677 NCIT:C3041 Gingival fibromatosis is characterized by a slowly progressive benign enlargement of the oral gingival tissues. Both genetic and pharmacologically induced forms of gingival fibromatosis are known. The most common genetic form, hereditary gingival fibromatosis (HGF), is usually transmitted as an autosomal dominant trait, although sporadic cases are common and autosomal recessive inheritance has been reported. UMLS:C0399440 HP:0000169 Fibroma