Also found in: Dictionary, Thesaurus, Encyclopedia.
A congenital malformation that presents a slowly growing mass of abnormal tissue in multiple sites. The tissues are appropriate to the organ in which the hamartomas are located but are not normally organized. They may appear in blood vessels as hemangiomata, and in the lung and kidney. They are not malignant but cause symptoms because of the space they occupy.
See also: hamartoma
Medical Dictionary, © 2009 Farlex and Partners