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Dive into the research topics where Sadahiko Masuda is active.

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Featured researches published by Sadahiko Masuda.


Respiration | 1987

Chemotactic Factors Present in the Supernatants of Cultured Sarcoid Granulomas

Shinichi Ohdama; Yasuyuki Yoshizawa; Masahiko Tanoue; Motoichi Tanaka; Akira Ikeda; Sadahiko Masuda; Tetsuro Okabe

The present study was undertaken to test whether cultured lymphocytes and epithelioid cells from sarcoid granulomas obtained from patients with active stage 2 sarcoidosis produced chemotactic factors (CF) for leukocytes as assessed by modified Boydens method. The results indicate that: (1) CF for mononuclear cells and for neutrophils were detected in supernatants from cultured sarcoid granulomas; (2) similar activity was detected in culture supernatants from both lymphocytes and epithelioid cells; (3) CF present in the supernatants of cultured epithelioid cells were similar physically to those which other investigators have disclosed to be released by alveolar macrophages, (4) CF in the supernatants of cultured lymphocytes were similar to the lymphokines based on an estimation of molecular size; (5) neutrophils from patients with sarcoidosis were less responsive to zymosan-activated sera and did not respond well to CF derived from their own granuloma, whereas mononuclear cells from sarcoid patients responded well to CF. In conclusion, CF are present in the supernatants of cultured sarcoid granulomas and they appear to preferentially attract mononuclear cells from sarcoid patients.


Haigan | 1999

A Case of Long-term Survival after Removal of Cerebellar Metastasis Followed by Resections of Multiple Lung Cancer.

Akio Yamazaki; Sadahiko Masuda; Yoshio Oose; Minoru Tahara; Kazuki Nakahara; Kazuhiro Yakumaru

症例は75歳 (第2肺癌時), 男性.1982年6月に左小脳腫瘍で腫瘍摘出術を施行され, 転移性脳腫瘍, 腺癌と診断された.原発巣の検索を行ったが, 当時は不明であった.術後4年目に胸部X線, CT上, 右上葉に辺縁不整な腫瘤影を認めた.1986年9月, 右上葉切除術+R2aを施行した.病理で腺癌と判明し, 先の脳腫瘍は肺癌の転移と診断された.肺癌切除11年後の1997年1月, 胸部CT上, 両下肺野に限局性の間質性肺炎像を認め, 追跡していたが, 10月左下肺野の陰影に変化を認め, 精査入院となった.エコー下針生検の結果, 扁平上皮癌と診断された.1997年11月17日, 呼吸機能上の問題から左S6区域切除術を施行した.術後合併症なく, 現在脳腫瘍手術後16年経過しているが, 再発なく生存中である.


Haigan | 1999

Prognostic Factor and Repeated Pulmonary Resection for Metastases of Colorectal Carcinoma.

Kazuki Nakahara; Sadahiko Masuda; Yoshio Ohse; Minoru Tahara; Akio Yamazaki; Yoshie Yamashita; Kazuhiro Yakumaru

大腸癌肺転移切除例29例を対象に, 予後因子, 複数回手術の有用性について検討を行った.全体の5年生存率は50%, 10年生存率は44%, 中間生存期間 (MST) 38Mだった.転移個数別では単発14例, 多発15例で, それぞれの5年生存率は単発例79%, 多発例15%で, 単発例の予後が良好である傾向を認めた (p=0.06).両側多発と一側多発で生存率を比較したが差を認めず, 原発部位, DFI, 手術方法でも差を認めなかつた.複数回手術を行った症例は8例あり, そのうち2回手術を行った症例が6例, 3回手術を行つた症例が2例だった.8例中最長生存例は70ヵ月生存した.複数回手術例の初回手術を起点とした5年生存率は38%, MST: 38Mだった.再切除後のMSTは35Mで, 全体のMSTとほぼ同等だった.大腸癌肺転移に対する複数回手術は予後を改善すると思われ, 手術が可能であれば, 再切除をする意義があると思われた.


Haigan | 1979

A case of small cell anaplastic carcinoma accompanied with Eaton-Lambert syndrome and a review of Japanese literature

Sachio Kawai; Sadahiko Masuda; Tetsuo Sato; Motoichi Tanaka; Mitsunori Saito; Keizo Hirayama

小細胞未分化肺癌に小脳症状並びに典型的Eaton-Lambert症候群を合併した47才男性例を報告した.筋電図上低頻度刺激でwanning現象, 高頻度刺激でwaxing現象を示し, カルシウム剤と塩酸グアニジンが筋力回復に有効であった.肋間筋の組織学的検索でtype Igroupingの所見を, 電顕でsecondary synaptic cleftsの数と面積の増加を認めた.また, 本邦文献でのEaton-Lambert症候群を集計検討し, 本邦では脳神経支配領域筋の症状を呈する例の多い傾向を認めた.


The journal of the Japanese Respiratory Society | 2002

An Autopsy Case of Pulmonary and Central Nervous System Metastatic Osteosarcoma Treated with Thirty-Six Courses of Chemotherapy Over Four Years

Toshio Ito; Akihiko Mochida; Keisuke Saito; Kiyomi Nishi; Shinichi Sasaki; Tetsuya Hisada; Hajime Morinari; Kazuki Nakahara; Minoru Tahara; Sadahiko Masuda; Kazuhiro Yakumaru


The American review of respiratory disease | 1984

Lymphoid Interstitial Pneumonia Associated with Depressed Cellular Immunity and Polyclonal Gammopathy1

Yasuyuki Yoshizawa; Shinichi Ohdama; Akira Ikeda; Morio Ohtsuka; Sadahiko Masuda; Motoichi Tanaka


The Japanese journal of thoracic diseases | 1990

Two Cases of Mediastinal Goiter with Progressive Deviation of the Trachea by its Growth and their Thyroid Hormone Values in the Fluid of the Cystic Lesions

Yoshiyuki Doi; Jun Ueki; Takashi Dambara; Toshihiro Nukiwa; Yoshio Ohse; Hiroshi Izumi; Sadahiko Masuda; Toshimasa Uekusa; Shiro Kira


Haigan | 1999

A Clinical Study of Resected Primary Lung Cancer in Young Adults.

Akio Yamazaki; Sadahiko Masuda; Yoshio Oose; Minoru Tahara; Kazuki Nakahara; Yoshie Yamashita; Kazuhiro Yakumaru


The Japanese journal of thoracic diseases | 1996

[Pulmonary cavernous hemangioma--identification of its endothelial cell origin by immunohistological staining].

Hiroki Ienaga; Hideki Takahashi; Takashi Dambara; Hiroshi Izumi; Kohei Mikami; Sadahiko Masuda; Toshiharu Matsumoto; Toshimasa Uekusa; Shiro Kira


The Japanese journal of thoracic diseases | 1993

A Case of Intralobar Pulmonary Sequestration Associated with an Accessory Diaphragm

Yoshiyuki Doi; Tomohiro Tsuchida; Kouji Suzuki; Toshio Itoh; Tetsuya Hisada; Hajime Morinari; Kazuki Nakahara; Toshinori Okazaki; Sadahiko Masuda; Kazuhiro Yakumaru

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