睪丸旁脂肪癌爲極罕見之腫瘤，通常以無痛性、緩慢生長之腫塊爲表現，在術前常被診斷爲腹股溝疝氣或脂肪瘤。我們報告一個以急性疼痛性、疑似箝閉性疝氣表現的睪丸旁腫瘤之病例；經根除性睪丸切除術後，病理檢驗證實爲睪丸旁脂肪癌。同時回顧睪丸旁脂肪癌之臨床症狀、診斷及治療。

Liposarcomas of the paratesticular region are rare tumors that usually present as painless, slowly growing inguinal or scrotal masses, which are usually diagnosed as being an inguinal hernia or lipoma before surgical intervention. We report 1 case of a paratesticular liposarcoma that mimicked an incarcerated inguinal hernia, with the presentation of an acutely painful mass in the left inguinal area. The diagnosis of an incarcerated inguinal hernia was clarified by abdominal computed tomography to be a paratesticular tumor. A radical orchiectomy was performed, and a liposarcoma was diagnosed by the pathological examination. We review the clinical symptoms, diagnosis, and treatment of paratesticular liposarcomas.