Riichiro Takanashi

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Histopathologic examination was done on 18 cases after percutaneous ethanol injection therapy (PEIT) for hepatocellular carcinoma. In eight cases, the lesion was treated by PEIT alone; in the other ten cases, PEIT was combined with transcatheter arterial embolization. The lesion was completely necrotic in 13 cases, 90% necrotic in four cases, and 70%(More)
Parathyroid adenomas are subdivided into chief cell and oxyphil cell variants. However, the parathyroid carcinomas described thus far have been only of the chief cell type. Two cases of oxyphil cell carcinoma of the parathyroid gland are reported, with light and electron microscopic study. The patients presented apparent clinical hyperparathyroidism with(More)
A 45-year-old woman with malignant fibrous histiocytoma (MFH) of the breast following breast conserving therapy (BCT) is described. She noticed a lump in her left breast 52 months after BCT for breast cancer. The lump was excised and nodular fasciitis was initially diagnosed. However, the tumor recurred locally 4 times in the next 18 months. MFH was finally(More)
We report a case of pseudolymphoma of the kidney. Examination of a surgically resected specimen showed that the lesion was localized in the renal parenchyma. It was impossible to achieve an accurate preoperative diagnosis clinically or radiologically because there were no characteristic findings. To the best of our knowledge no previous case of a(More)
Choriocarcinoma is the most malignant among germ cell tumors in the testis. However little is known about the early stage of its development. To understand the development of testicular choriocarcinomas, twenty cases of testicular choriocarcinoma were studied histologically and immunohistochemically. It was found that in the early stage of development,(More)
An autopsy case of primary fibrosarcoma occurring in the liver of a 75-year-old female is presented. The tumor, arising from the lateral upper portion of the right lobe, measured 14 cm in greatest dimension. Light microscopy of the tumor revealed homogeneous, spindle-shaped cells with abundant collagen fibers showing a classic herring-bone pattern.(More)
A 14-year-old boy developed broad posterolateral myocardial infarction. During cardiac surgery at age five, a small pericardial window had been made. Autopsy revealed an extensive left-sided pericardial defect and necrosis of the left ventricular free wall, which had herniated and strangulated through the enlarged pericardial defect.
DNA ploidy and DNA content of two surgically resected sclerosing hemangioma of the lungs were examined by flow cytometry. Cell kinetics were analyzed by using DNA index and the proliferation index. Both cases were diploid, and their proliferation indices were 22.91 and 25.53, respectively, suggesting that they are benign tumors.