Shinzo Kitahara
Toho University
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Featured researches published by Shinzo Kitahara.
Surgery Today | 2006
Shinzo Kitahara; Toshihide Ito; Shigeharu Hamatani; Kazutoshi Shibuya; Tadaaki Shiba
We report a case of local squamous cell carcinoma recurrence of thyroid papillary carcinoma, 4 years after subtotal thyroidectomy, in an 82-year-old woman. The papillary cancer of the right thyroid was histopathologically classified as T2a, N0, M0, Ex1; pT2a, pN1b, pEx1; Stage III. Fine-needle aspiration cytology of the recurrent tumor revealed atypical squamous epithelium-like cells with keratinization. The tumor was judged cytologically to be class III, defined as a suspicious malignancy and, after reoperation, it was diagnosed histopathologically as papillary carcinoma recurrence with extensive squamous metaplasia. The recurrent papillary carcinoma was thought to have changed to a squamous cell carcinoma because most of the tumor was occupied by atypical squamous cells, with a small amount of glandular tissue. The primary tumor was histologically diagnosed as a well-differentiated papillary carcinoma at the initial operation. It contained numerous tall neoplastic cells with eosinophilic granules and pseudostratified nuclei, indicating that it could potentially transform into squamous cell carcinoma. We report this case as an example of how squamous cell carcinoma of the thyroid can develop.
Nihon Heikatsukin Gakkai zasshi | 1990
Tetsuro Ozawa; Kawamura K; Shinzo Kitahara; Hitoshi Murakuni; Hisatsugu Deguchi; Nagato Shimada; Yukio Tsugu
Segments and Thirty-Vella type loops of the small intestine of dogs were prepared, and the excitation propagation pattern of the interdigestive migrating electric complex (IMEC) was observed by electromyography. The nerve regulatory mechanism in intestinal movement was investigated. The results indicated that first, the frequency of the basic electric rhythm (BER) is controlled so that a downward gradient is formed from the upper to the lower intestine, but this gradient continues to be controlled by a two-dimensional control mechanism involving parietal factors and extrinsic nerves due to transection of the intestines and damage to the extrinsic nerves in the dominant region. However, propagation of the IMEC in the small intestine appeared to be regulated by a combination of the two-dimensional control mechanism involving extrinsic and parietal nerves corresponding to the BER control mechanism. It was clear that the propagation mechanism of IMEC is related to the BER frequency, and propagation of the IMEC is downward in accordance with the frequency gradient of BER.
Journal of Pediatric Surgery | 2001
Shinzo Kitahara; Mineo Wakabayashi; Tadaaki Shiba; Kyoei Nonaka; Hiroko Nonaka; Izumi Kobayashi
Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 1993
Kyoei Nonaka; Muneyuki Yamaguchi; Shinzo Kitahara; Tomoaki Hatakeyama; Chiaki Hashimura; Jun Takatsuka; Hiroko Nonaka
Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 1998
Kyoei Nonaka; Hideyuki Koshino; Tatsuo Nozaki; Chiaki Hashimura; Shinzo Kitahara; Tadaaki Shiba; Hiroko Nonaka
Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1994
Kyoei Nonaka; Hiroko Nonaka; Shinzo Kitahara; Masahiro Isogai; Yukio Tsugu; Setsuo Takeuchi; Muneyuki Yamaguchi
Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 1997
Shinzo Kitahara; Tatsuya Shirakura; Hiroyuki Kanemitsu; Nagato Shimada; Kyoei Nonaka; Chiaki Hashimura; Tadaaki Shiba; Yukio Tsugu
Nippon Daicho Komonbyo Gakkai Zasshi | 1995
Shinzo Kitahara; T. Ishii; H. Satake; N. Shimada; Itaru Kobayashi; A. Hara; Kyoei Nonaka; Yukio Tsugu; M. Yamaguchi
Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1993
Shinzo Kitahara; Kyoei Nonaka; Masahiro Isogai; Shigehiko Kaburagi; Hisatsugu Deguchi; Itaru Kobayashi; Muneyuki Yamaguchi; Yukio Tsugu
Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 1992
Hisatsugu Deguchi; Tetsuro Ozawa; Shinzo Kitahara; Tatsuo Nozaki; Yukio Tsugu; Hiroko Nonaka