Low Grade Central Osteosarcoma

**Semantic type:** Neoplastic Process

**Definition:** A low grade osteosarcoma arising from the medullary portion of the bone. It affects the long bones and is characterized by the presence of fibroblastic stroma and osteoid production. Pain and swelling are the usual sign and symptom. The prognosis is more favorable than conventional osteosarcoma.

**Synonyms:** - Intraosseous Well Differentiated Osteosarcoma - Intraosseous Well-Differentiated Osteogenic Sarcoma - Intraosseous Well-Differentiated Osteosarcoma - Intraosseous well differentiated osteosarcoma - LGCOS - Low Grade Intramedullary Osteosarcoma - Low-Grade Intramedullary Osteosarcoma - Low-grade central osteosarcoma - Low-grade intramedullary osteosarcoma