Masato Ohno

Intralobar pulmonary sequestration; with special emphasis on bronchial communication.

The radiologic and pathologic features of eight cases of intralobar pulmonary sequestration are reported. Special attention was given the communication between the cystic areas and the normal bronchial tree. In three of five surgical specimens, probing revealed such communications. Microscopically, the transition from the normal bronchus to the cysts revealed no inflammation to suggest fistulous communication secondary to infection. The possibility of preexisting congenital bronchocystic communications within the pulmonary sequestrations was therefore suggested.

Magnetic resonance imaging of intracranial venous angiomas

Magnetic resonance imagings (MRI) were made of intracranial venous angioma (six angiographically proved, four presumed). All draining veins were identified as a linear or a small round structure with a flow void. The stellate configuration was observed in seven of the ten patients. In two of the ten, the associated intraparenchymal hematoma was evident. Increased intensity of adjacent parenchyma on T2-weighted images was detected in four of ten patients, and a decreased intensity on the T1-weighted images was noted in three of eight. Thus, MRI is a pertinent diagnostic modality for evaluating intracranial venous angioma. Angiography does not seem to be required for confirmation in patients with typical MR findings.

CT and MRI manifestations of primary pulmonary plasmacytoma.

Primary pulmonary plasmacytoma (PPP) is rare and its radiographic appearances have been seldom described. We report on a patient with PPP presenting with a hilar mass on chest radiograph. The diagnosis was confirmed by immunohistochemical study of the resected specimen. The computed tomographic and magnetic resonance imaging findings are presented.

MR imaging of middle cerebral artery occlusion without cerebral infarction

Magnetic resonance (MR) images of 12 patients with angiographically proven middle cerebral artery (MCA) occlusion were analyzed, retrospectively. In three of the 12 patients, cerebral infarctions related to the MCA occlusions were not evident. Two of the three patients were cases of atherosclerotic occlusion and the remaining patient had an acute thromboembolism. In all of the occluded M1 portions of the MCA the flow void was absent and there were isointense linear structures, with or without a hyperintense component in the Sylvian vallecula, on T1-weighted images. For nine of the 12 patients, the absence of flow void in the ipsilateral Sylvian fissure was evident on the T2-weighted images. Therefore, even in cases with no evidence of a cerebral infarction, the presence of flow void in the Sylvian vallecula and Sylvian fissure must be searched for in routine reviews of MR images. If MR imaging can be obtained on an emergency basis, appropriate interventional therapy may be immediately initiated.

CT of malignant mesenchymoma of the esophagus

Malignant mesenchymoma rarely originates from the gastrointestinal tract. Here we describe a case of an esophageal origin in a 50-yearold man. Computed tomography contributed to the diagnosis by having shown unique ossifications in the tumor.

Bone metastasis of lung cencer

原発性肺癌335例のX線写真を検討し, 44例 (13%) に骨転移を認めた. その90% (40例) は溶骨性転移であったが, 硬化性転移も10% (4例) に認められた. 硬化性転移の組織型は腺癌2例, 未分化癌 (小細胞癌以外) 2例であった. ほとんどの症例は赤色随領域への転移であるが, 末梢の骨への転移は2例に認められた. 硬化性転移のうち腺癌の1例はいわゆるbone carcinosisと考えられた.臨床的には, 骨転移例の70%が落痛を訴えた.