Sinusoidal hemangioma is a condition, by something of a misnomer, a term for a lesion that is a vascular malformation with various clinical presentations. This condition may present as nodules, often in the breast area or extremities, or as large firm bulging facial masses beneath normal-appearing skin; the latter have an aggressive and invasive course.
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Sinusoidal hemangioma Wikipedia(Text) CC BY-SA