A generic term for a group of hereditary diseases characterized by hamartomas involving multiple tissues; e.g., von Hippel-Lindau disease, neurofibromatosis, Sturge-Weber syndrome, tuberous sclerosis. SYN: phakomatosis. [Van der Hoeve's coinage fr. G. phakos, mother-spot]
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phaco·ma·to·sis .fak-ō-mə-'tō-səs n, pl -to·ses -.sēz any of a group of hereditary or congenital diseases (as neurofibromatosis) affecting the central nervous system and characterized by the development of hamartomas
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phac·o·ma·to·sis (fak″o-mə-toґsis) phakomatosis.Medical dictionary. 2011.