No mass effect was seen, and response to corticosteroid and immunoglobin therapies was good. A, 12-weighted axial MR image shows large lesion with heterogeneous signal intensity in right frontal cortex and subcortical white matter. Neither mass effect nor midline shift was noted.

We describe ferumoxides-enhanced magnetic resonance imaging findings in a 60-year-old man with confluent hepatic fibrosis in advanced cirrhosis. The extension and internal structure of confluent fibrosis were well demonstrated with ferumoxides-enhanced proton-density spin-echo magnetic resonance images, showing a wedge-shaped area of high signal intensity corresponding to the extension of fibrosis and internal focal areas of low signal intensity, presumably corresponding to residual functioning liver parenchyma. This case suggests a potential utility of ferumoxides-enhanced magnetic resonance imaging for characterizing this tumor-mimicking disorder.

No abstract

Two patients with gastric carcinoma underwent CT colonography (CTC) for preoperative work-up. Although no obvious peritoneal nodules were seen on axial CT images, colonic wall deformities were noted on three-dimensional (3D) air images. Multiplanar-reformatted images revealed corresponding colonic wall thickening at the deformities, and in addition, dense cordlike structures connecting the primary gastric cancer and colonic wall thickening were also observed. In one patient, cordlike indurations consistent with peritoneal invasion were found to connect the primary gastric cancer, gastrocolic ligament, and transverse mesocolon during exploratory surgery, and in the other, colonic scars consistent with peritoneal invasion after chemotherapy were observed. These observations suggest that CTC could be of potential use for the differentiation of transperitoneal colonic invasion and gastric cancer.

CAD improves radiologist sensitivity in screening patients when used as either a second- or primary-reader paradigm, although the latter may improve specificity and efficiency more.