2. Department of histopathology, Apollo Speciality hospitals, Teynampet, Chennai, India.
Extraskeletal osteosarcoma is a rare malignant soft tissue tumour, which represents about 4% of all osteosarcomas and 1% of all soft tissue sarcomas. We present a case of extraskeletal osteosarcoma, albeit at a hitherto undescribed site, duodenum. This case report addresses the clinicopathological features and differential diagnosis of extraskeletal osteosarcoma and the importance of clinicopathological correlation in the diagnosis and workup of such cases.
Keywords: Extraskeletal osteosarcoma, duodenum, malignant soft tissue tumour, clinicopathological features