A rare case report of extraosseous osteosarcoma in a 35-year-old female

Extraosseous osteosarcoma is a rare tumour that mostly affects males more than females. It accounts for 1.2% of all soft tissue sarcomas. It arises from soft tissues without direct attachment to the skeletal system and produces osteoid, bone, or chondroid material. Extraosseous osteosarcoma usually occurs middle-aged and elderly patients (5th–6th decade of life). Extraosseous osteosarcoma is highly aggressive. Due to rarity of this tumour, few data is available in the literature regarding the causes, symptom, and treatment of the disease hence this case report aims to focus some light on the rarity of this tumour along with its radiological features, presentations, and course of treatment. Here, we are discussing a rare case of extraosseous osteosarcoma of 35-year-old female with no prior history of trauma or radiation exposure.