Neurofibromas
Location: (a): Superficial lesion in subcutis or dermis. (b): All sites and all organs. Clinical: (a) Painless nodule, few symptoms. (b) Café au lait spots, typically in the axilla. More…
Central Low-Grade Osteosarcoma
Localization: Preferred sites are long bones, particularly the distal femur and proximal tibia. Rare in flat bones, exceptional in the hands and feet. It is usually centered in the metaphysis…
Fibrosarcoma
Location: Most are deep tumors. Anywhere where fibrous tissue is found. Thigh, knee, trunk, arm, forearm. Rare in the head and neck. Hand and foot are most frequent sites of…
Periosteal Chondrosarcoma
Location: Mainly in the limbs: distal femur, proximal tibia, and proximal humerus. Clinical: Swelling with little or no pain. Imaging: On x-ray – globose mass lying on the outer surface…
Multicentric Osteosarcoma
On radiographs multiple mainly sclerotic lesions are easily detected. The epiphyseal involvement is frequent in this lesion High-grade osteoblastic osteosarcoma usually extensively sclerotic with low cellularity and diminished cytological anaplasia…
Fibromatosis
T2 MR images, coronal of the thigh and sagittal of the foot. The thigh lesion has a low signal and infiltrates the muscles, whereas one in the foot is nodular…
Langerhans Cell Histiocytosis
Location: Flat and short bones of the trunk: skull (parietal, frontal site), ribs, pelvis, vertebral body, clavicle, and scapula. Among long bones: proximal half of the femur, humerus, and tibia…
Central Chondrosarcoma
Localization: Proximal femur, pelvis, proximal humerus, scapula, and proximal tibia. In long bones, it starts metaphyseal extending as far as half or more of the entire bone. Clinical: Deep, discontinuous,…
Dedifferentiated Chondrosarcoma
Location: Proximal femur, pelvis, and proximal humerus. Clinical: On a history of long duration with moderate symptoms, a rapid progression of pain and swelling occurs. Pathologic fractures frequent. Imaging: On…
