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A Recurrent Case of Targetoid Hemosiderotic Hemangioma: A Case Report and a Comprehensive Review of the Literature.

Targetoid hemosiderotic hemangioma is an acquired vascular malformation of unknown origin. We report the case of a 31-year-old man with a recurrent and spontaneous regressive targetoid hemosiderotic hemangioma. Diagnosis relied on clinical and histological findings. Physical examination revealed presence of an approximately 2 cm targetoid lesion located on the left arm, and associated with pain after pressure. No trigger agent (trauma, insect sting) was reported. Dermoscopy showed a group of red lacunae centrally, encircled by an intermediate yellow circular homogenous area and a red violaceous homogenous ring in the periphery. The histopathological examination and the immunohistochemical staining of the lesion were characteristic for a hemangioma-like proliferation of vessels in the upper part of the dermis, similar to a targetoid hemosiderotic angioma. We also review epidemiological, clinical, and histopathological findings in 6 similar cases presented in the literature. Spontaneous regression and recurrence have rarely been described in this type of skin lesion.