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Macrodystrophia lipomatosa is a rare form of localized gigantism characterized by progressive overgrowth of all the mesenchymal elements with a disaproportionate increase in the fibroadipose tissues. This congenital abnormality occurs most frequently in the distribution of the median nerve in the upper extremity and in the distribution of the planter nerves(More)
The Segond fracture is a small vertical avulsion injury of the lateral aspect of the proximal tibia just distal to the plateau. It results from excessive internal rotation and varus stress. The plain film and arthrographic findings were studied in nine patients with the fracture. Although previous publications have relied primarily on the anteroposterior(More)
Localized areas of active myositis ossificans, occurring without a clear history of antecedent trauma, have been referred to as a "pseudo-malignant osseous tumor of soft tissue." This lesion may be mistaken both roentgenographically and pathologically for a malignancy. The roentgenographic signs which favor a diagnosis of non-neoplastic heterotopic bone(More)
Four patients, ranging in age from 6 to 32 years, with surgically proved parosteal lesions of the femoral neck are presented. In one case, magnetic resonance (MR) imaging was the initial study ordered prior to plain radiography, and in three cases MR imaging was performed after plain radiography. Findings in the MR images were abnormal in all four cases;(More)
By using patient radiographs and pathologic specimens, the bicipital groove of the humerus was studied to determine the normal configuration and common abnormalities of this region. Factors analyzed in evaluating the bicipital groove included the medial wall angle, depth and width of the intertubercular sulcus, and presence or absence of bony spurs arising(More)
Bursae or abscess cavities communicating with the hip joint were demonstrated by hip arthrography or by computed tomography (CT) in 40 cases. The bursae or abscess cavities were associated with underlying abnormalities in the hip, including painful hip prostheses, infection, and inflammatory or degenerative arthritis. Structures communicating with the joint(More)
PVNS is a proliferative disorder that can affect joints, tendons and bursae. Its etiology is unknown. The most widely accepted theories attribute this disorder to a chronic inflammatory response or a benign neoplasm of fibrohistiocytic origin. On gross specimens, the synovial changes are characterized by villous and/or nodular hyperplasia. This disorder(More)
Four cases of posterior limbus vertebrae are presented, three in the lumbar spine and one in the lower thoracic spine. All four patients have myelographic documentation of herniated disc material affecting the spinal canal. One patient underwent an additional discogram that confirms the pathophysiology of the limbus vertebra by demonstrating that contrast(More)