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Extraskeletal osteosarcoma infiltrating pancreas, spleen, gastric, and left kidney: a case report
Wifanto Saditya Jeo1, Shintia Christina2, Nathaniel Jason Zacharia3
1Digestive Surgery Division, Surgery Department, Dr. Cipto Mangunkusumo National Central General Hospital, Jakarta, Indonesia. wifanto.saditya@ui.ac.id.
Background:
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.
Case Presentation:
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.
Conclusion:
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.
