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Plexiform schwannoma is a benign peripheral nerve sheath tumor composed exclusively of Schwann cells arranged in a plexiform pattern. Most plexiform schwannomas are skin tumors and visceral localization is very rare. To our knowledge, there are six cases localized in visceral organs. We describe herein the first known case of plexiform schwannoma of the(More)
We report a case of 72-year-old man found to have a primary malignant melanoma in the jejunum. The patient was noted to be anemic and had lower abdominal pain on his visit to the Department of Gastroenterology. However, an upper gastrointestinal series and colonofiberscopic examination revealed no abnormalities. After clinical examinations, the radiological(More)
In order to improve the clinical results of chemotherapy protocols for patients with malignant bone and soft tissue tumors, an attempt was made to establish a methodological approach to chemo-sensitivity testing using a modified regrowth assay system. We have established a chemo-sensitivity testing system using methylcholanthrene-induced round cell sarcoma(More)
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