Testicular Pouch Hibernoma: A Case Report.

Hibernomas are rare lipomatous tumors derived from brown adipose tissue. Only two cases of hibernomas in the scrotum have been reported in the literature so far. Brown adipose tissue is responsible for thermogenesis in hibernating mammals and embryos. In adult humans, reminiscent brown tissue is most frequently located in the axial skeleton, scapular waist, and neck. This case report describes the finding of a testicular pouch hibernoma in a 34-year-old male who presented with a nodule in the scrotum, which was initially suspected to be a lipoma. The diagnosis was confirmed by histopathological analysis, and the patient was treated by surgical excision. Despite its rarity, hibernoma should be part of the differential diagnosis for lipoma, the most frequent benign mesenchymal neoplasm worldwide.