%0 Case Reports
%T Extraskeletal osteosarcoma infiltrating pancreas, spleen, gastric, and left kidney: a case report.
%A Jeo WS
%A Christina S
%A Zacharia NJ
%A Razi K
%J J Med Case Rep
%V 18
%N 1
%D 2024 Jul 10
%M 38982521
暂无%R 10.1186/s13256-024-04608-x
%X <B>BACKGROUND: </B>Extraskeletal osteosarcoma is an extremely rare malignancy that accounts for 1% of soft tissue sarcoma and 4.3% of all osteosarcoma. Extraskeletal osteosarcoma can develop in a patient between the ages of 48 and 60 years. The incidence of extraskeletal osteosarcoma is slightly higher in male patients than in females.<BR><B>METHODS: </B>A 50-year-old Caucasian male patient presented with a 6-month history of intermittent lower-left back pain that limits his activity. Prior ultrasonography and abdominal computed tomography scan showed a diagnosis of kidney stone and tumor in the lower-left abdomen. The computed tomography urography with contrast revealed a mass suspected as a left retroperitoneal malignant tumor. Hence, the tumor was resected through laparotomy and the patient continued with histopathological and immunohistochemistry examination with the result of extraskeletal osteosarcoma.<BR><B>CONCLUSIONS: </B>Extraskeletal osteosarcoma presents diagnostic challenges requiring multimodal examination, including histological and immunohistochemistry analyses. This case underscores the aggressive nature and poor prognosis despite undergoing the current suggested treatment.