A benign tumor composed of both blood vessel tissue and smooth muscle tissue, typically growing slowly.
From Greek 'angeion' (vessel) + 'myo-' (muscle) + '-oma' (tumor). This pathological term names mixed tumors containing vascular and muscular components.
Angiomyomas are interesting because the smooth muscle in blood vessel walls is doing double duty—it's both part of the vessel's normal structure and part of the tumor itself, so surgeons have to be careful during removal.
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