Chondrosarcoma
By origin Primary CHS (arising de novo) Secondary CHS (arising from the cartilage cap of an osteochondroma, from sporadic enchondroma, or in skeletal enchondromatosis or osteochondromatosis) By anatomic location CHS…
Aneurysmal Bone Cyst
Fig. 48.1 (a, b) ABC in the upper metaphysis of a humerus. Lytic, rapidly expansible lesion Fig. 48.2 (a, b) Two months follow-up shows a rapid ballooned expansion of the…
Fibrous Dysplasia
Sites of Involvement Monostotic and polyostotic forms arise more frequently in long bones (proximal femur, tibia, humerus) and craniofacial bones – especially in the jaws (the maxilla is more involved…
An Imaging Approach to Bone Tumors
Age Tumor First and second decade Nonossifying fibroma Unicameral bone cyst Aneurysmal bone cyst Chondroblastoma Langerhans cell histiocytosis Osteosarcoma Ewing sarcoma Third through fifth decade Giant cell tumor Lymphoma Parosteal…
Conventional Central Osteosarcoma
Primary osteosarcoma: For the most part they originate in the long bone metaphysis (90 %), especially in the knee region and proximal humerus (locations with the most proliferative growth plates)….
Simple Bone Cyst
Fig. 47.1 Simple bone cyst in its most common site. Well outlined centrally and symmetrically located metaphysiodiaphyseal lucency. The cortices are expanded and thinned. The lesion is not wider than…
Osteoblastoma
One-third in spine: In vertebrae, osteoblastoma tends to involve the posterior elements. Most common locations in the spine are, by frequency, cervical, lumbar, thoracic, and sacral. One-third in tubular bones:…
Myositis Ossificans
Sites Lower extremity: quadriceps and gluteus muscles Upper extremity: brachialis muscle Clinical Symptoms and Signs First stage – pain or tenderness, hours or days after the injury: Rarely localized erythema…
Giant Cell Tumor of Bone
Sites of Involvement It has a major preference for the epiphysis of the long bones, about half of the cases occurring about the knee: distal femur, proximal tibia, and proximal…
Metaphyseal Fibrous Defect
Fig. 51.1 Metaphyseal fibrous defect (MFD) of the distal femur. (a, b) Anteroposterior and lateral X-ray showing a large radiolucent lesion, with well-defined sclerotic border. (c) Axial CT scan showing…
