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Extra-Abdominal Desmoid Tumors
AAOS — Extra-abdominal desmoids are deep-seated tumors that are rare and benign, meaning they do not spread to other parts of the body (metastasize). Desmoid tumors are also called aggressive fibromatoses. They have this name because they are fibrous, ...More…
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Unicameral (Simple) Bone Cyst
AAOS — A unicameral (simple) bone cyst is a cavity found within a bone that is filled with straw-colored fluid. It is a benign (non-cancerous) condition. Unicameral bone cysts (UBC) are usually found in patients younger than 20 years of age. Unicameral ...More…
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Paget's Disease of Bone
AAOS — Paget's disease of bone is a chronic disease of the skeleton. It is a common disease in older people, occurring in about 3 percent to 4 percent of the population over age 50. It is slightly more common in men than women. Left, Paget's disease of . ...More…
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Osteochondroma (Bone Tumor)
AAOS — Solitary osteochondroma is a developmental abnormality of bone. It occurs when part of the growth plate forms an outgrowth on the surface of the bone. This bone outgrowth may or may not have a stalk. When a stalk is present, the structure is ...More…
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Multiple Myeloma/Plasmacytoma
AAOS — This disease generally occurs in older adults. Fewer than 3 percent of cases occur in people younger than 40 years of age. Multiple myeloma tends to be more common in men than women. It is twice as common in African Americans as it is in ...More…
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Metastatic Bone Disease
AAOS — Cancer that arises in an organ, such as the lungs, breast, prostate, kidneys, thyroid, and others, and subsequently spreads to bone is termed metastatic bone disease (MBD). More than 1.2 million new cancer cases are diagnosed each year, and ...More…
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Giant Cell Tumor of Bone
AAOS — Giant cell tumor of bone (GCT) is a rare, aggressive non-cancerous (benign) tumor. It generally occurs in adults between the ages of 20 and 40 years. Giant cell tumor of bone is very rarely seen in children or in adults older than 65 years of ...More…
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Fibrous Dysplasia
AAOS — Fibrous dysplasia is a chronic condition of the skeleton where a portion of a bone develops abnormally. The condition begins before birth. It is caused by a gene mutation that affects the cells that produce bone. Although the abnormal bone forms ...More…
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Ewing's Sarcoma
AAOS — Ewing's sarcoma is a cancerous (malignant) tumor. It usually begins growing initially in a bone. Occasionally, it also begins in the soft tissues (extraosseous Ewing's sarcoma). Unlike most cancers that are known to arise from a certain kind of .. ...More…
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Enchondroma
AAOS — Enchondroma (en-kon-DRO-ma) is one type of benign (noncancerous) cartilage tumor that appears on the inside of the bone. These tumors usually begin and grow in childhood, then stop growing but remain present throughout adulthood. They are often ...More…
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Bone Tumor
AAOS — A tumor is a lump or mass of tissue that forms when cells divide uncontrollably. For most bone tumors, the cause is unknown. A growing tumor may replace healthy tissue with abnormal tissue. It may weaken the bone, causing it to break (fracture). ...More…
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Management
AAOS — Extremity bone sarcomas are rare and pose a challenging problem for patients and their physicians. Physicians who treat bone cancer are called orthopaedic oncologists. Osteosarcoma is the most common primary bone malignancy that is considered for ...More…