A case of Ewing sarcoma family tumor of the kidney treated with robotic-assisted partial nephrectomy

Issei Suzuki; Masashi Kubota; Shiori Murata; Noriyuki Makita; Yoichiro Tohi; Mutsushi Kawakita

doi:10.1016/j.eucr.2019.100900

A case of Ewing sarcoma family tumor of the kidney treated with robotic-assisted partial nephrectomy

Urol Case Rep. 2019 May 2:25:100900. doi: 10.1016/j.eucr.2019.100900. eCollection 2019 Jul.

Authors

Issei Suzuki¹, Masashi Kubota¹, Shiori Murata¹, Noriyuki Makita¹, Yoichiro Tohi¹, Mutsushi Kawakita¹

Affiliation

¹ Department of Urology, Kobe City Medical Center General Hospital, 2-2-1, Minatojimaminamimachi, Chuo-ku, Kobe-city, Hyogo, 650-0047, Japan.

Abstract

Ewing sarcoma family tumors (ESFTs) of the kidney represents less than 1% of all renal tumors. A 45-year-old Japanese woman presented with right abdominal pain. Contrast-enhanced computed tomography showed a 12 × 8-cm right cystic renal mass. The mass was diagnosed as cystic renal cell carcinoma (RCC) and right partial nephrectomy was performed. Immunohistochemical studies showed that the tumor was positive for CD99 (membranous staining in tumoral cells), indicating ESFT. The patient is doing well without further therapy after 1 year of follow-up. To our knowledge, this is the first report of renal ESFT mimicking cystic RCC on diagnostic imaging.

Publication types

Case Reports