Classic Osteosarcoma
Imaging: The plain x-ray is usually diagnostic. Typically, OS starts intramedullary but breaches the cortex and expands in the soft tissues. It is usually a combination of radiolucency and radiodensity,…
Primary Lymphoma of Bone
Localization: About half of the cases are localized in the skeleton of the trunk and skull (particularly jaws). The other half occurs in the long bones (metaphysis or diaphysis). Not…
Extraskeletal Ewing’s Sarcoma
Location: Any soft tissue site can be involved, but most common are the paravertebral region, retroperitoneum, and chest wall, followed by the extremities. Clinical: Large, destructive mass. Histopathology: Grossly it…
Clear Cell Sarcoma
Location: Foot, ankle, knee, and upper limb. Clinical: Slowly growing, moderate size, painless, globose mass. Diagnosis: On MRI, elliptical, smoothly outlined mass, slightly or markedly hyperintense on T1, white lesion…
Myxofibrosarcoma
Location: The most frequent sites are the lower limbs, followed by upper limbs and limb girdles. Rare in trunk, head and neck, and hands and feet. Most cases described in…
Epithelioid Sarcoma
Location: Among the most frequent sarcomas occurring in the hand and forearm. Palmar region of the hand, dorsal region of the forearm, plantar aspect of the foot, anterior region of…
Undifferentiated Pleomorphic Sarcoma (UPS)
Localization: Skeletal muscles of extremities and retroperitoneum. Tumor is deep in 90 % of cases. Clinical: Globose and painless swelling with no characteristic clinical features other than a frequently rapid…
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…
Solitary Fibrous Tumor
Location: Lower limb (thigh), retroperitoneum, pelvic region, upper limb, trunk, head, and neck. Deeply located. Clinical: Slow enlarging painless mass, increased skin temperature, telangiectasia, unilateral varicose veins, pulsation, audible bruit,…
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…
