A case of perirenal extra-adrenal myelolipoma mimicking liposarcoma

Hiroki Shimoda; Toshiki Kijima; Atsuko Takada-Owada; Kazuyuki Ishida; Takao Kamai

doi:10.1016/j.eucr.2023.102523

A case of perirenal extra-adrenal myelolipoma mimicking liposarcoma

Urol Case Rep. 2023 Aug 14:50:102523. doi: 10.1016/j.eucr.2023.102523. eCollection 2023 Sep.

Authors

Hiroki Shimoda¹, Toshiki Kijima¹, Atsuko Takada-Owada², Kazuyuki Ishida², Takao Kamai¹

Affiliations

¹ Department of Urology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi, 321-0293, Japan.
² Department of Diagnostic Pathology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi, 321-0293, Japan.

Abstract

Myelolipoma is a benign tumor composed of mature adipose tissue and normal hematopoietic components. It usually occurs in the adrenal glands but rarely in the extra-adrenal region. However, it is difficult to differentiate extra-adrenal myelolipoma from well-differentiated liposarcoma on the basis of the radiological findings. We report the case of a 66-year-old male with perirenal and extra-adrenal myelolipoma who underwent radical tumor resection with nephrectomy after a preoperative diagnosis of liposarcoma. Intraoperative assessment by the surgeon and intraoperative pathological evaluation are important considering the divergent prognoses of myelolipoma and liposarcoma.

Keywords: Extra-adrenal myelolipoma; Liposarcoma.

Publication types

Case Reports