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…
Peripheral (Secondary) Chondrosarcoma
Imaging: On x-ray – typical aspect of an osteochondroma with more abundant calcifications or ossifications, intense, and diffused radiopacities, with thicker superficial uncalcified layer and with fuzzy margins towards the…
Dermatofibrosarcoma Protuberans
Location: Trunk, groin, and proximal extremities. Clinical: Nodular or plaque-like painless cutaneous tumor, slowly growing. Diagnosis: A well-defined superficial tumor. On MRI, in T1 usually iso- or hypointense to skeletal…
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…
Extra-abdominal Fibromatosis
Clinical: Deep, painless, firm or hard, and poorly circumscribed mass that may be adherent to the skin or bone and that grows insidiously and slowly for several months. Tumor mass…
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…
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…
Mesenchymal Chondrosarcoma
Location: Trunk and craniofacial bones. Rare in the limbs. Clinical: Pain and swelling. Imaging: On x-ray – osteolytic lesion with permeative destruction of bone, ill-defined margins, breaking the cortex, with…
