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The authors reviewed 76 magnetic resonance (MR) images of 38 patients with osteosarcoma treated with preoperative chemotherapy (intraarterial cisplatin with or without systemic chemotherapy). Histologic maps of the surgical tumor specimens in 33 cases were correlated with either late-chemotherapy or postchemotherapy MR images. There were four MR… (More)
Lymphomas of the solid abdominal viscera include hepatic (both primary and secondary), splenic, and pancreatic lymphomas. The use of the various diagnostic imaging modalities in each of these lymphomas is discussed, and the imaging appearance of each is described.
Computed tomography (CT) is an excellent imaging modality for demonstrating the size, shape, and position of the spleen, as well as for depicting intrasplenic pathologic features. However, it has limited value in the diagnosis of splenic involvement by lymphoma. Greater accuracy in diagnosing splenic lymphoma may be obtained by demonstrating adenopathy in… (More)
Computed tomographic (CT) and angiographic findings in 14 patients (eight men, six women, aged 30-72 years) with sarcomatoid renal cell carcinoma (SRCC) and various types of renal sarcoma are described. There were four patients with SRCC; three, leiomyosarcoma; two, liposarcoma; two, fibrosarcoma; and one each of unclassified renal sarcoma, clear cell… (More)
The magnetic resonance (MR) imaging features of liposarcoma were correlated with histology in 15 patients. The MR findings for liposarcoma were not specific. The six myxoid liposarcomas and two atypical lipomatous tumors, however, had distinctive MR features, i.e., nodular masses of slightly heterogeneous intermediate to high signal intensity (SI),… (More)
A recurrent mediastinal mass, believed to be thymus, in an infant with classic idiopathic histiocytosis-X underwent massive cavitation following chemotherapy. Both the mass and cavitation resolved. The exact nature of development of air inside the mass is not known but communication with the airways or airspaces of the lungs is suspected.
In this review, a brief discussion of the important events of pancreatic embryology is followed by presentation of congenital anomalies and normal variants. For each variant, the appearance at different radiologic modalities including computed tomography, magnetic resonance (MR) imaging, endoscopic retrograde cholangiopancreatography, MR… (More)
The computed tomographic (CT) findings in 118 patients with the diagnosis of leiomyosarcoma were reviewed. The tumor masses visualized in these patients were often quite large; extensive necrotic or cystic change was a frequent finding. Calcification was not observed in these tumors. The liver was the most common site of metastasis in these patients, with… (More)
Fourteen patients with extraosseous Ewing's sarcoma were evaluated by computed tomography (CT) and conventional radiography. The sites of involvement were in the lower extremities (six cases), the chest wall (four), pelvis (two), and the paravertebral region (two). In seven cases, the initial contrast-enhanced CT disclosed a necrotic soft tissue mass in… (More)