Bone sarcoma

Bone sarcoma is a group of rare malignant tumors that arise from bone tissue. This category encompasses several distinct tumor types, including osteosarcoma (the most common primary malignant bone tumor), chondrosarcoma (arising from cartilage cells), Ewing sarcoma (a small round cell tumor of bone), and other less common subtypes such as fibrosarcoma and undifferentiated pleomorphic sarcoma of bone. These tumors primarily affect the skeletal system but can metastasize to other organs, most commonly the lungs. Clinical features typically include localized bone pain that may worsen at night or with activity, swelling or a palpable mass near the affected bone, pathological fractures, and limited range of motion in adjacent joints. Systemic symptoms such as fatigue, weight loss, and fever may occur, particularly in advanced or metastatic disease. Osteosarcoma and Ewing sarcoma tend to occur more frequently in children, adolescents, and young adults, often affecting the long bones around the knee or the pelvis, while chondrosarcoma is more common in middle-aged and older adults. Diagnosis involves imaging studies (X-ray, MRI, CT, bone scintigraphy, and PET-CT) followed by biopsy for histological confirmation. Treatment is typically multimodal and depends on the specific subtype, tumor grade, location, and extent of disease. For osteosarcoma and Ewing sarcoma, treatment generally includes neoadjuvant (pre-surgical) chemotherapy, surgical resection with wide margins (limb-sparing surgery when possible, or amputation), and adjuvant chemotherapy. Ewing sarcoma may also be treated with radiation therapy. Chondrosarcoma is primarily treated with surgery, as it is generally resistant to conventional chemotherapy and radiation. Advances in targeted therapies and immunotherapy are being investigated in clinical trials, but outcomes for metastatic or recurrent disease remain challenging.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

Common questions about Bone sarcoma