Phenotypic abnormality Hamartoma 2009-10-16T02:51:16Z true UMLS:C0018552 SNOMEDCT_US:400006008 HP:0010566 A disordered proliferation of mature tissues that is native to the site of origin, e.g., exostoses, nevi and soft tissue hamartomas. Although most hamartomas are benign, some histologic subtypes, e.g., neuromuscular hamartoma, may proliferate aggressively such as mesenchymal cystic hamartoma, Sclerosing epithelial hamartoma, Sclerosing metanephric hamartoma. SNOMEDCT_US:51398009