腎Solitary fibrous tumorの1例

Abstract

18歳女。左側腹部痛があり、CTで上腎杯に近接し造影効果のある腫瘍を認めた。MRIでは同部にT1・T2画像とも肝臓とiso signal intensityの腫瘍を認めた。悪性腫瘍を疑い腹腔鏡下左腎摘除術を行った。腫瘍は黄白色で、組織学的に膠原線維を介在して不規則に走行する紡錘形細胞の増殖像からなり、多数の厚壁血管、鹿角様に分岐する小血管を含んでいた。免疫染色ではCD34、bcl-2、vimentin、S-100蛋白陽性、EMA、HHF35、desmin、HMB45、pankeratin陰性であった。以上より、孤立性線維性腫瘍と診断された。

We report a case of solitary fibrous tumor (SFT) arising from a kidney. The patient was an 18-year-old female who visited our hospital with the complaint of left abdominal pain. Computed tomography revealed a slightly enhanced tumor of approximately 3 cm in diameter near the upper calyx of the left kidney. Renal cell carcinoma was suspected, and left nephrectomy was performed under laparoscopy. Histopathological examination revealed proliferation of CD34-positive spindle-shaped cells, and a diagnosis of SFT was made. There has been no local recurrence or distant metastasis for 15 months after the operation.