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Featured researches published by Akira Koyama.


Japanese Journal of Lung Cancer | 1988

A Case of Giant Localized Mesothelioma of the Pleura

Muneaki Waku; Hirosi Anno; Akira Koyama; Seiji Mizutani; Sinji Sisido; Yosinori Kawabata

症例は57才, 男性.5年前より緩徐な増大傾向が追え, 左胸腔の大半を占めるに至った巨大限局性胸膜中皮腫を報告する.血性胸水を伴っていた.CT像はよく濃染される不整の内部構造及び壊死部分を認め, 悪性の印象が強かったが, 67Gaシンチグラムは陰性であった.胸膜肺全摘術及び左横隔膜全摘術を施行した.腫瘍径は20×14cm, 重量は2000gであった.病理所見は良性であった.石綿汚染との関係は証明されなかった.


Archive | 1981

Transbronchoscopic Lung Biopsy for Diffuse Pulmonary Diseases

Hiroshi Anno; Akira Koyama

Lung biopsy combined with thoracotomy had been employed to confirm the diagnosis of pulmonary diseases having a diffuse lung shadow on chest X-ray. Establishment of the transbronchoscopic biopsy technique employing the flexible fiberoptic bronchoscope made the biopsy examination of such cases more convenient.


Archive | 1981

Complications Following Fiberoptic Bronchoscopy

Akira Koyama; Hiroshi Anno

Flexible fiberbronchoscopy has been well evaluated for diagnosis of pulmonary diseases and a few occurrences of complication following the performance is reported. Complications following flexible fiberbronchoscopy in our hospital were reviewed and the treatment and prevention for the complications were studied.


Haigan | 1994

Pathological Study to Investigate the Mechanism of Cavity Formation and Cyst Formation in Pulmonary Adenocarcinoma.

Yoshinori Kawabata; Toshihiko Sakai; Kazuo Fukushima; Seiji Mizutani; Hironobu Sugita; Yutuki Nakajima; Akira Koyama; Fujio Ohishi; Bunpei Kimura


The Japanese journal of thoracic diseases | 1992

Characteristics of Chronic Interstitial Pneumonia Seen in Lungs Operated for Cancer

Kenji Kusajima; Yoshihiko Murata; Fujio Ohshi; Hisao Shimoide; Bunpei Kimura; Hironori Sugita; Akira Koyama; Hiroyasu Nakano; Yoshinori Kawabata


Haigan | 1991

A Case of Sclerosing Hemangioma of the Lung, with Protrusion into the Bronchial Lumen and Invasion to the Lymphoid Tissue of the Peribronchial Connective Tissue.

Hisako Hasimoto; Muneaki Waku; Akira Koyama; Yosinori Kawabata


Kekkaku(Tuberculosis) | 1990

THE EFFICACY OF X-RAY SIGNS FOR DIFFERENTIAL DIAGNOSIS OF SMALL LUNG CANCER AND TUBERCULOMA

Hitoshi Tokuda; Masakazu Aoki; Kiichiro Isoe; Tatsuro Iwasaki; Akira Koyama; Tachio Tateno; Takeo Nakajima; Toru Mori; Shigeharu Morioka; Yoshiaki Moritani


The Japanese journal of thoracic diseases | 1989

Immunohistochemical study of idiopathic bronchiolitis obliterans organizing pneumonia

Hiroyuki Yamada; Hisako Hashimoto; Yoshinori Kawabata; Kazurou Iwai; Hironobu Sugita; Akira Koyama; Kunio Mizuguchi; Yoshio Murata; Koushu Nagao; Fujio Ohishi


Haigan | 1989

The efficacy of X-ray signs for the diagnosis of small lung nodules.

Hitosi Tokuda; Masakazu Aoki; Kiichiro Isoe; Tatsuro Iwasaki; Akira Koyama; Tachio Tateno; Takeo Nakajima; Toru Mori; Shigeharu Morioka; Yosiaki Moritani


The Japanese journal of thoracic diseases | 1992

Clinico-Pathological Study of Collagen-Related Pulmonary Lesions in Cases of Open Lung Biopsy

Yoshinori Kawabata; Kazuro Iwai; Hironobu Sugita; Akira Koyama; Siro Katagiri; Kenzo Takagi; Yasuhiro Kondo; Hiroyuki Taniguchi; Kenji Kusajima; Hujio Ohishi

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