A 42-year-old man presented complaining of a painless and slow-growing mass, which started 4 years ago. Examination revealed a huge pedunculated upper-back lesion, with multiple foci of necrosis (Figure 1). In virtue of its characteristic location and clinical presentation, the hypotesis of a brown-fat tumor (hibernoma) was promptly considered. Ultrasonography and post-surgical sample analysis indicated the presence of a well-vascularized, lipid-containing tumor, mainly composed of multivacuo-lated cells, corroborating the diagnosis. The patient remains asymptomatic, and subsequent follow-ups have been uneventful.
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