A hamartia is a focal malformation consisting of disorganized arrangement of tissue types that are normally present in the anatomical area.Vitreoretinal disease: the essentials – Google BooksDorlands Medical Dictionary A hamartia is not considered to be a tumor, and is distinct from a hamartoma, which describes a benign neoplasm characterized by tissue misarrangement similar to a hamartia (i.e., tissue types that are typical of the area but arranged in an atypical manner).
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