article_metadata: Hiromasa Arai Yasushi Rino Teppei Nishii Norio Yukawa Nobuyuki Wada Hisashi Oshiro Tsuyoshi Ishida Noboru Nakaigawa Munetaka Masuda
article_metadata: 10.1155/2010/327591
article_metadata: Case Rep Med
article_metadata: 2010;2010:327591.
article_metadata: CC BY
article_metadata: https://pubmed.ncbi.nlm.nih.gov/20224645/
article_metadata: Case Reports
article_metadata: PMC2833305
article_metadata: 20224645
article_metadata: Well-differentiated extraskeletal osteosarcoma arising from the retroperitoneum that recurred as anaplastic spindle cell sarcoma
article_metadata: 2010