Synovial Sarcoma (SS)
Location: 80 % extremities. Lower limb (60 %: thigh, knee, foot, ankle) and upper limb (23 %: forearm, wrist, shoulder). Only 10 % within a joint. Usually, close to a…
Myositis Ossificans
Clinical: Posttraumatic type: painful enlarging mass with intense inflammation of the surrounding tissues. If the involved anatomic compartment is immobilized, inflammation resolves, and the mass slowly regresses. Complete maturation of…
Extraskeletal Myxoid Chondrosarcoma
Location: Deep-seated, proximal extremities and trunk. Clinical: Enlarging painless soft tissue mass. Imaging: Although imaging characteristics are nonspecific, most tumors appear lobulated, and highly myxoid tumors have a homogeneous high…
Alveolar Soft Part Sarcoma
Location: Deep-seated, lower limb within the muscle, thigh. Clinical: Globose or multinodular mass, slowly increasing, and painless. Tumor may be large, present from many years, and richly vascularized with pulsation…
Malignant Schwannoma: Malignant Peripheral Nerve Sheath Tumor
Location: In association with major nerve trunks: sciatic nerve, brachial plexus, sacral plexus. Gluteal region and pelvis, thigh region, shoulder region, and axilla are the most frequent sites. Clinical: Rapidly…
Myofibroblastic Sarcoma
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…
Ewing Sarcoma (ES)
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…
Rhabdomyosarcoma
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…
Leiomyosarcoma
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…
