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Featured researches published by Toshifumi Yoshio.


Diseases of The Colon & Rectum | 1997

Undetectable expression of hMLH1 protein in sporadic colorectal cancer with replication error phenotype

Junichi Koike; Kanae Yamada; Shoichi Takano; Yoshinori Kikuchi; Hiromichi Hemmi; Minoru Koi; Kazunori Tsujita; Kenzo Yanagita; Toshifumi Yoshio; Hiroyuki Shimatake

PURPOSE: Four DNA mismatch repair genes have been identified as being susceptible genes for hereditary nonpolyposis colorectal cancer. Deficiency of one of the mismatch repair genes causes the replication error phenotype in more than 80 percent of patients with hereditary non-polyposis colorectal cancer and in 10 to 30 percent of patients with sporadic colorectal cancer. To determine which mismatch repair gene is lacking the function in patients with replication error-positive colorectal cancer, several approaches have been used at the nucleic acid and protein levels. We studied replication error in 40 samples of randomly selected colorectal cancers and expression of hMSH2 and hMLH1 proteins analyzed by immunoblot in the tumor and normal tissues of the replication error-positive and replication error-negative samples. MATERIALS AND METHODS: Frozen tumor and normal tissues were obtained from 40 Japanese patients who had colorectal cancer. According to the Amsterdam criteria, those patients were classified as having 39 sporadic and 1 unknown colorectal cancers. Genomic DNA was extracted from tumor and normal tissues for determining replication error with eight microsatellite markers. Expression of hMSH2 and hMLH1 proteins in cell lysates of tumor and normal tissues of 16 patients was analyzed by immunoblot. RESULTS: The replication error phenotype was found in 6 (15 percent) of the 39 sporadic cases. hMLH1 protein was not detected in two of the six replication error-positive tumor tissues and not in the normal tissues, indicating that the tumor cells of the two patients had severe mutations in both alleles of thehMLH1gene. Another four replication error-positive and ten replication error-negative tumors and normal tissues expressed hMLH1 protein. hMSH2 protein was detected in all samples. CONCLUSION: hMLH1 protein was undetectable in the two tumor tissues of the six replication error-positive samples of sporadic colorectal cancer. The detection procedure used here may have potential use for determining a dysfunctional mismatch repair gene product.


Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1999

A Case of Hyperplastic Polyp at The Ureterosigmoidal Anastomosis Occuring 11 Years after Total Cystectomy.

Kimihiko Funahashi; Tatsuya Chida; Toshimichi Maeda; Natsuki Tokura; Toshitugu Miki; Yasushi Suzuki; Hiroshi Matsumoto; Kazunori Tsujita; Kazuo Kobayashi; Toshifumi Yoshio

今回, われわれは膀胱全摘後11年して血便を契機に発見された, 尿管S状結腸吻合に発生した乳頭状腫瘍を経験したので報告する. 症例は58歳の男性で, 血便を主訴に当院を受診した. 入院後の注腸検査と下部消化管内視鏡検査にてS状結腸の尿管吻合近傍に腫瘤の形成を認めたため, 悪性腫瘍を疑ったが, 生検ではGroup2であった. 尿管S状結腸吻合術後のS状結腸に発生する腫瘤には癌の頻度が高いことからS状結腸切除を行った. 組織学的には悪性所見は認められず, 陰窩上皮の乳頭状の増生と間質の浮腫, 炎症を伴う過形成性ポリープと診断した. 膀胱全摘出後の尿管S状結腸吻合部に発生した過形成性ポリープの報告は比較的まれで, 今回, 自験例を含めた報告例についての文献的考察を行った.


Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1988

A case report of synchronous triple cancer of combined hepatocellulal-cholangio carcinoma, squemous cell carcinoma of the lung, and adenocarcinoma of the colon.

Masashi Watanabe; Toshimichi Maeda; Toshifumi Yoshio; Haruhiro Nakazaki; Hidetoshi Haba; Kazuki Tsudita; Yukitake Hasebe; Kikue Tanaka

は じめに 手掌紅斑,ク モ状血管腫は認められなかった。 診断技術の発達,早 期発見,早 期治療による予後の 入 院時血液生化学検査 :末檎血で軽度の自血球の増 改善,平 均寿命の延長などにより,近 年,各 種組合せ 加 を認めた。生化学検査は正常であったが,ICG 15分 の重複悪性腫瘍が増加しつつある11われわれは,原発 値 は11%と軽度上昇していた,HBs Ag,HBs Abと 性肝癌のうちでもまれな混合型肝癌と肺扁平上皮癌, も 高くなかった。2-fetO protein(AFP)は 正常範囲内 S状 結腸癌が同時性に認められた 1例を経験したので で あったが,carcinOembryonic antigen(CEAル ま16.0 文献的考察を加えて報告する。 症 例 症例 :73歳,男 性,無 職. 主訴 :亥嗽. ng/dlと上昇していた (表1). 入院時胸部 X線 写真では,右 下肺野に境界不整な 70×60mmの 腫瘤陰影を認めた。気管支鏡検査にて右 下棄 B9の入田部に粘膜表面の平滑な狭窄像を認め,生 嗜好品 :煙草 1日20本50年間, ビール毎日2本. 検 の結果,扁 平上皮癌と診断した。また 3回の喀疾細 家族歴,既 往歴 t特記事項はなかった。 現病歴 :昭和60年 3月 下旬より咳嗽,発 熱,全 身俗 表 1 入 院時血液生化学校査


Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1986

Clinical evaluation of angiography for colorectal cancer with special reference to invasion and hepatic metastasis.

Kazuo Kobayashi; Katsuhiko Mori; Yasushige Nagasawa; Kenzo Yanagita; Toshifumi Yoshio

血管造影で大腸癌の壁深達度を客観的に予測する方法はいまだ確立されていないが, 著者らは結腸癌に対し一定の予測基準を用いて診断している.今回, 70例の結腸癌の術前写真を再読影した結果, 平均正診率は85%であり, 動静脈のvasa recta長枝の病的変化が良い指標であった.直腸癌に関しても同様の予測基準を作るべく, 上直腸動脈分枝別読影法を用いて, 110例の術前写真で描出している病的血管変化の部位と組織学的壁深達度の関係を検索した結果, RsおよびRa直腸癌では十分客観的予測が可能であることが判った.腹腔動脈造影の肝転移予測能についても60例で検討したが, 正診率は77%であった.しかし左葉病変の診断能は低かった.


Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1997

A Study for Cytological Behavior of Colorectal Carcinoma from the Viewpoint of Histological Type and Ki-67 Labeling Index in the Infiltrated Region of Tumor

Kimihiko Funahashi; Kazunori Tsujita; Toshitsugu Miki; Junichi Koike; Tadahisa Ogai; Yasushige Nagasawa; Kazuo Kobayashi; Kenzo Yanagita; Toshifumi Yoshio


Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1989

Clinical evaluation of splenectomy for immunological influence in surgery of the gastric cancer.

Ryoichi Honda; Kazuo Kobayashi; Hazime Kase; Yukihiko Sato; Kenzo Yanagita; Toshifumi Yoshio


Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1991

Clinical Significance of Flow Cytometric Analysis of DNA Content in Colorectal Carcinoma.

Kazunori Tsujita; Kimihiko Funahashi; Masashi Watanabe; Hiroshi Nakamura; Kiyoshi Watanabe; Natsuki Tokura; Yasushige Nagasawa; Tadahisa Ogai; Kazuo Kobayashi; Kenzo Yanagita; Shintaro Kuramoto; Toshifumi Yoshio; Shiro Tsujimoto


Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 1998

A CASE OF METASTATIC OVARIAN TUMOR AFTER CUR B RESECTION OF COLONIC CANCER

Satoru Kubota; Kimihiko Hunahashi; Yasushige Nagasawa; Kazunori Tsujita; Kazuo Kobayashi; Toshifumi Yoshio


Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 1996

CLINICOPATHOLOGICAL STUDY OF MUCINOUS CARCINOMA OF THE LARGE INTESTINE

Satoru Kubota; Kazunori Tsujita; Junichi Koike; Yasushi Suzuki; Shigekazu Yamashita; Natsuki Tokura; Kimihiko Funahashi; Tatsuo Yasushi; Yasushige Nagasawa; Kazuo Kobayashi; Kenzo Yanagita; Toshifumi Yoshio


Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 1994

A CASE OF SMALL LIVER CELL CARCINOMA MIMICKING CHOLANGIOLOCELLULAR CARCINOMA

Shigeki Hanawa; Masashi Watanabe; Yukitake Hasebe; Yasushi Suzuki; Shintaro Kuramoto; Kenzo Yanagita; Toshifumi Yoshio; Hiroko Nonaka

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