Radiologic Misunderstanding of Cutaneous Angiomyolipoma in the Alar Base

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Abstract

In this article, we will examine a case of cutaneous angiomyolipoma in the right nasal alar base area of a 36-year-old man. Generally, angiomyolipoma occurs in the kidney and, histologically, has features that are similar to cutaneous angiomyolipoma: smooth muscle cells, mature adipose cells, and a convoluted thick-walled blood vessel. Clinically, renal angiomyolipoma is related to tuberous sclerosis, but cutaneous angiomyolipomas occur very rarely, with a total of only 23 cases documented in the literature, with 39% (9/23) of those cases occurring in the ear or surrounding areas.

In particular, the abundance of blood vessels inside a cutaneous angiomyolipoma produces good enhancement on computed tomographic image, making it easy for the tumor to be mistaken for a vascular tumor. In this particular case, we will report about a previously unheard case of cutaneous angiomyolipoma occurring in the nasal alar base that was mistaken for a vascular tumor.

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