Radiology Key

Location: Low-grade myofibroblastic sarcomas most commonly occur in the head and neck region, including the oral cavity, pharynx and parapharyngeal regions, and proximal extremities and trunk; occasional cases can occur…

Localization: ES is as frequent in flat and short bones as it is in long bones. Among the appendicular skeleton, the most common localization is the femur, followed by the…

Location: R. of the limbs constitutes 15 % of all tumors. Type (a): Head, neck, genitourinary tract (botryoid variety), retroperitoneum. Type (b): Limbs (forearm, hand, foot). Type (c): Limbs (prevails…

Location: Type (a): retroperitoneum. Commonly involves kidney, pancreas, and vertebral body for direct extension. Type (b): in the limbs, from piliferous areas. Quite small, less than 2 cm. subcutaneous tumors…

Location: >50 % knee, then elbow, shoulder, wrist, hip, and ankle. Extra-articular form in the fingers. Clinical: Pain, limited joint motion, and sensation of joint crackling. Rare blocking and joint…

Location: (a) Paratendinous (frequent): in the sheath of a flexor tendon of the fingers, in the palm of the hand close to a metacarpophalangeal joint, in the wrist, on the…

Localization: The axial skeleton is the preferred site. In the appendicular skeleton, the metaepiphyses are preferred. Very rare in bones of the hand and foot. Clinical: Pain (usually relieved by…

Localization: The most common locations of metastatic carcinoma are the spine, pelvis, femur, ribs, and skull. Metastases may affect any bone but are rare distal to elbow and knee. Clinical:…

Location: Deep soft tissues of the thigh and buttocks. Clinical: Progressively enlarging painless mass. Imaging: X-rays, CT, and MRI reveal a large deep-seated soft tissue mass with variable mineralization. By…

Localization: Diaphysis of the long bones. The tibia is affected in 80 % of cases. Followed by the fibula, femur, humerus, ulna, and radius. Exceptional in the soft tissues of…