A Rare Case of Extraskeletal Primary Osteosarcoma of Breast: How We Managed

Abstract

Primary osteosarcoma arising in breast is a rare form of extra skeletal osteosarcoma, accounting for less than 1% of all breast cancers and 12.5% of sarcomas arising in breast. Fewer than 150 cases of primary osteosarcoma of breast have been reported in the medical literature in the last 50 years. It was reported to have worse outcome compared to typical skeletal osteosarcoma. Osteosarcoma of breast presents in elderly age group unlike skeletal osteosarcoma, which occurs in young people. Diagnosis is by histopathological examination of malignant osteoid and ruling out underlying skeletal involvement.