Periosteal Osteosarcoma
Localization: Tibia and femur. Less frequent in the humerus, rare in the fibula and other long bones. Usually located in the diaphysis, occasionally in the metaphysis. Clinical: Palpable mass and…
High-Grade Osteosarcoma of the Surface
Lateral radiograph of the knee and axial T1 MR image. The tumor forms bone, mainly develops in the soft tissues, but starts from the cortex, which has a limited lysis….
Telangiectatic Osteosarcoma
Clinical: Clinically, the tumor has an aggressive course, with an expanding soft tissue mass, soft and tender on palpation, with increased local temperature. Pathologic fracture is not uncommon. Imaging: Imaging…
Schwannoma (Neurilemoma, Neurinoma)
Location: Spinal roots, nerves of the mediastinum or of the retroperitoneum, peroneal, and ulnar nerve. Single nodule. Clinical: Slow and progressive pain and neurological symptoms. Liquoral block, compression of the…
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…
