未發現睪丸腫瘤前，於交通意外後發生病理性股骨頸骨折作爲睪丸癌之表現是少見且易誤導的。我們報告一位十八歲男性在輕度交通意外後主訴嚴重的左髖部疼痛。理學檢查發現左陰囊腫大。基於骨折處之影像學及病理切片檢查確定爲轉移之睪丸癌。稍後進行根除性睪丸切除術及全身性化學藥物治療。這種表現很少見，但我們認爲應包含在年輕男性病理性骨折之鑑別診斷。

Testicular cancer initially presenting as a pathological femoral neck fracture without awareness of a testicular mass after a traffic accident is unusual and misleading. We report on an 18-year-old male who complained of severe left hip pain after involvement in a minor traffic accident. A physical examination incidentally revealed an enlarged left scrotum. Based on radiographic and pathological findings of a biopsy of the fracture site, metastatic testicular cancer was confirmed. A radical orchiectomy was later performed. This presentation is rare, but we suggest that testicular cancer should be included in the differential diagnoses of pathological fractures in young male patients.