Bone Tumor

Introduction
• Bone tumor is neoplastic growth of tissue in bone, abnormal growth can benign or malignant.
• Average five year survival in united states after being diagnosed with bone & joint cancer is 67%.
CLASSIFICATION
 Tumor classified as primary tumors, which originate in bone derived cells & tissues.it may be neoplastic, developmental, traumatic, infectious & inflammatory etiology.
 Secondary tumors originate in other sites & spread (metastasizes) to skeleton.
 Carcinomas of prostate, breasts, lungs, thyroid & kidneys most commonly.
Secondary malignant bone tumor estimated to be 50 to 100 times as primary
TISSUE TYPES BENIGN MALIGNANT SITE INCIDENCE
Chondrogenic (cartilage-forming tumors) • OSTEOCHONDROMA
• Chondroma • Pelvis, scapula, ribs
• Hands, feet, ribs, spine, sternum, or long bones. •
Myelogenic (bone marrow tumors) Giant cell tumor Diaphysis of long bones 4 to 5% , higher in males
 Primary tumor divide in benign & cancers
Common benign bone tumors may neoplastic, developmental, traumatic, infectious or inflammatory etiology.
Example of benign tumors as osteoma, osteoid osteoma, osteochondroma, enchondroma, giant cell tumor, aneurysmal bone cyst, fibrous dyspasia of bone
BENIGNS
1.Osteoma- new piece of bone grows on another piece.
2.Osteoid osteoma- arise from osteoblast cells , size is less than 1.5 cm.
3.Osteochondroma– tumor form of cartilage capped bony projections or outgrowth on bone surface.
4.Osteoblastoma– uncommon osteoid tissue forming , primary neoplasm of bone.
5.Enchondroma- cartilage cyst found in bone marrow.
6.Giant cells tumor –