Acquired Vascular Tumors of the Skin in the Adult

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Abstract
Blood vascular tumors in the adult are a diagnostic and prognostic enigma. Their histologic interpretation also is debatable. These proliferating and recurring vascular tumors clinically are suggestive of neoplasia. Although the majority of these lesions are benign, the possibility of malignancy cannot be overlooked. The lesions may vary in size from small papules to large tumors. The small papules, which may be red, cyanotic blue, or black, are caused by changes in the most superficial vessels in the cutis. At times there are also changes in the overlying epidermis, such as atrophy, hypertrophy, and hyperkeratosis. The larger lesions involve the capillaries of the midcutis and even proliferate into the subcutaneous fat. Histologically, these vascular tumors differ in the degree of maturation of the proliferating cells. The more mature form lumens, while the less mature form solid cords or masses of cells. Because of the

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