AUTHOR=Chen Junyong , Liao Hongxian , Zhan Rungen , Zheng Qiaoli , Deng Jian , Wang Guojie , Zhang Jie 

TITLE=Case Report: Primary osteosarcoma of the kidney

JOURNAL=Frontiers in Oncology

VOLUME=13

YEAR=2023

URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2023.1175518

DOI=10.3389/fonc.2023.1175518

ISSN=2234-943X

ABSTRACT=<p>Extraosseous osteosarcoma is a rare malignant tumor, most commonly occurring in the thigh, upper limbs, and retroperitoneum. However, there are only a few reported cases of renal osteosarcoma. Herein, we present the case of a 54-year-old woman with malignant extraosseous osteosarcoma of the left kidney. CT and MR imaging revealed a soft tissue mass originating from the left kidney.</p>