Jun Yuza
Chiba University
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Featured researches published by Jun Yuza.
Neurological Research | 2000
Kazumasa Fukuda; Naokatsu Saeki; Seiichiro Mine; Masaru Oga; Akira Yamaura; Jun Yuza; Hiroshi Nagata; Tsutomu Numata; Yoshiaki Konno
Abstract The purpose of this study was to retrospectively evaluate the effectiveness of anterior craniofacial resection in the treatment of nasal and paranasal malignant tumors involving anterior skull base. Between 1992 and 1998, 13 patients with nasal or paranasal malignant tumors underwent this surgical procedure. The site and time of metastasis or recurrence, and survival outcome were retrospectively surveyed. Current status of long-surviving patients and their subjective assessment of the surgical treatment were also evaluated through questionnaires. Median follow-up period was 52 months. Nine patients (69%) were alive with no evidence of disease. Of these patients, eight had survived for more than three years. Recurrence or metastasis occurred in four patients (31%). The mean time interval between surgery and recurrence or metastasis was 11 months. According to the results of questionnaires to long-surviving patients, 89% patients had some complaints. In particular, complaints of unsightly appearance were manifested by all these patients. When the patients themselves evaluated their current conditions resulting from this surgical treatment, 63% were dissatisfied. These results suggest that this surgical treatment is valid for selected patients in regard to survival outcome. When the effectiveness of this treatment is evaluated, however, psychological and functional issues should not be taken lightly. [Neurol Res 2000; 22: 545-550]
Laryngoscope | 1997
Tsutomu Numata; Akiyoshi Konno; Yousuke Takeuchi; Tatsuaki Katahashi; Jun Yuza; Toyoyuki Hanazawa; Junichi Ono
Resection of the common carotid or internal carotid artery is occasionally unavoidable in cases of advanced head and neck carcinoma with carotid artery involvement. To prevent the consequent decrease in cerebral perfusion, we have developed a contralateral external carotid‐middle cerebral artery bypass grafting technique. From 1990 through 1995, six patients with advanced head and neck cancer involving the carotid artery underwent total tumor resection combined with vascular reconstruction using the contralateral external carotid‐ middle cerebral artery bypass grafting. No bypass‐related complications occurred in any patient postoperatively. Cerebral hemodynamics after surgery indicated that this bypass graft worked steadily over a long term and supplied sufficient volume of blood to the cerebral cortex on the opposite side in every case.
Neuroreport | 1999
Keisuke Shiba; Takumi Miura; Jun Yuza; Takashi Sakamoto; Yoshio Nakajima
To reveal the kind of information about the larynx which is transmitted to the central nervous system during vocalization, we studied discharge patterns of single fibers of the laryngeal afferent nerve during electrically induced vocalization in ketamine-anesthetized cats. Recorded fibers were classified into four types based on their discharge patterns. Type A fibers responded to vocal fold vibration during vocalization. Type B fibers increased their activity during vocalization without synchronization with vocal fold vibration. Type C fibers decreased their activity during vocalization. Type D fibers discharged only at the onset of vocal fold adduction and abduction. We discuss the functional properties of these afferents and the possibility that these afferent inputs participate in the feedback control of vocalization.
THE LARYNX JAPAN | 1993
Ken Wada; Yasuhisa Yamanaka; Jun Yuza; Hirofumi Ito; Akira Mochida; Toshio Mitsuhasi; Takumi Miura; Haruhiko Suzuki; Toshio Kaneko
Journal of Japan Society for Head and Neck Surgery | 1996
Takeshi Hino; Jun Yuza; Minoru Nomoto; Tsutomu Numata; Akiyoshi Konno; Koichi Nagano
THE LARYNX JAPAN | 1993
Takumi Miura; Jun Yuza; Yasuhisa Yamanaka; Ken Wada; Keisuke Shiba; Haruhiko Suzuki; Akiyoshi Konno; Toshio Kaneko
Japanese jornal of Head and Neck Cancer | 1996
Takeshi Hino; Jun Yuza; Tsutomu Numata; Katsutake Hayasaki; Akiyoshi Konno
Japanese jornal of Head and Neck Cancer | 1996
Tsutomu Numata; Jun Yuza; Tatuaki Katahashi; Takeshi Hino; Akiyoshi Konno
THE LARYNX JAPAN | 1995
Keisuke Shiba; Takashi Sakamoto; Ken Wada; Yasuhisa Yamanaka; Jun Yuza; Takumi Miura; Haruhiko Suzuki; Akiyoshi Konno; Toshio Kaneko
THE LARYNX JAPAN | 1995
Takashi Sakamoto; Keisuke Shiba; Ken Wada; Yasuhisa Yamanaka; Jun Yuza; Takumi Miura; Haruhiko Suzuki; Akiyoshi Konno