Low grade osteosarcoma of maxilla: Report of a case and review of literature

Osteosarcoma is a rare malignant bone tumour characterized by bone or osteoid formation within. Low-grade osteosarcoma (LGOS) represents less than 1% of all osteosarcomas in the body. Because of its rarity and well differentiation, LGOS is usually misdiagnosed as a benign lesion. A 21-year-old male patient presented with a history of slowly expanding hard, painless mass in the left maxilla since six months, along with difficulty in breathing and numbness over left side of the nose since last two months. The radiological and histologic findings summatively suggested a spindle cell tumour with a wide range of differential diagnoses. This manuscript presents a critical evaluation of the clinical, radiographic, histologic and immunohistochemical findings of the case with a detailed discussion of all the probable differential diagnoses.