Fibromatosis
Extraabdominal Desmoid Tumor, Aggressive Fibromatosis CLINICAL SUMMARY Fibromatosis is a benign, locally aggressive tumor originating in an intermuscular location, with a highly infiltrative growth pattern and a propensity to recur…
Giant Cell Tumor of Tendon Sheath
Tenosynovial Pigmented Villonodular Synovitis (PVNS), Nodular PVNS CLINICAL SUMMARY Giant cell tumor of tendon sheath is a slow-growing tumor associated with mechanical pain, most commonly in the hands and feet….
Vascular Malformations
Congenital Venous Malformation, Intramuscular Hemangioma, Low-Flow Vascular Malformation CLINICAL SUMMARY Congenital vascular malformations can be found in any organ. Intramuscular lesions, often described as intramuscular hemangiomas , are easily recognized…
Synovial Sarcoma
CLINICAL SUMMARY Synovial sarcoma is the fourth or fifth most common subtype of soft tissue sarcoma and is distinguished by its younger age of presentation, frequent history of pain, and…
Multiple Myeloma
CLINICAL SUMMARY Multiple myeloma presents as a proliferation of plasma cells in the marrow and is the most common primary malignancy of bone. Like other round cell tumors, myeloma lesions…
Aneurysmal Bone Cyst
CLINICAL SUMMARY Aneurysmal bone cysts (ABCs) derive their name from their radiologic appearance and therefore do not represent a single pathologic entity. Although many ABCs are actually secondary features of…
Elastofibroma
CLINICAL SUMMARY Elastofibroma is a slow-growing, reactive lesion that is found almost exclusively between the scapula and chest wall. These lesions are more frequent in older patients and are common…
Ewing Sarcoma
CLINICAL SUMMARY Ewing sarcoma is approximately half as common as osteosarcoma. It arises from bone marrow and almost always presents with a large soft tissue mass. Compared to osteosarcoma, it…
Giant Cell Tumor
CLINICAL SUMMARY Giant cell tumor of bone is a benign but destructive bone tumor that is usually discovered adjacent to the knee joint in young adults. Although curettage is the…
