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Dive into the research topics where Ryoichi Tsuchiya is active.

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Featured researches published by Ryoichi Tsuchiya.


Gastroenterologia Japonica | 1993

Hyperbaric oxygen therapy in the treatment of refractory peripancreatic abscess associated with severe acute pancreatitis

Kunihide Izawa; Tsukasa Tsunoda; Kazuhide Ura; Takashi Yamaguchi; Toshiya Ito; Takashi Kanematsu; Ryoichi Tsuchiya

SummaryFive patients with peripancreatic abscesses associated with severe acute pancreatitis were treated by hyperbaric oxygen therapy (HBO). In 3 patients, the course after surgical mobilization of the pancreas and drainage of the pancreas bed was complicated by peripancreatic abscesses. HBO was conducted under a pressure of 2.8 atmospheres for two hours dialy. Four of the 5 patients showed a progressive improvement in their condition. In one patient who failed to respond despite seven sessions of HBO, Pseudomonas aeruginosa was isolated from the discharge, and resection of necrotic tissue and drainage were performed. The main effects of HBO were the alleviation of high spiking fever, the improvement of white blood cell count and serum amylase levels, and the reduction of the abscess size. We recognized HBO to be a successful treatment for peripancreatic abscess associated with severe acute pancreatitis and better results were obtained than in cases that did not receive HBO.


Surgery Today | 1992

Intussusception of an appendiceal mucocele: Report of a case

Tsukasa Tsunoda; Toshifumi Eto; Harunobu Maeda; Nobuo Mochinaga; Masazumi Terada; Shigetoshi Matsuo; Ryoichi Tsuchiya; Yoshiko Takahara

A 66 year old Japanese female was admitted to our department for the examination and treatment of a mass in the cecum. She had experienced no symptoms or signs other than a positive test result for fecal occult blood. The mass in the cecum was confirmed by barium enema, colonofiberscopy and CT scanning. The presumptive diagnosis was a submucosal tumor of the cecum, however, a laparotomy subsequently revealed intussusception of an appendiceal mass. An ileocaecal resection with an ileocolic anastomosis was therefore performed and the mass was histologically diagnosed as a mucocele of the appendix. This patient is only the 24th case of intussusception of a mucocele of the appendix to be reported in Japan. A review of the available literature on this condition follows the case report.


Gastroenterologia Japonica | 1991

Caroli’s disease associated with hepatolithiasis: A case report and review of the Japanese literature

Tsukasa Tsunoda; Junichiro Furui; Masashi Yamada; Toshifumi Eto; Kazuhide Ura; Teiji Matsumoto; Tohru Segawa; Koichi Motoshima; Kunihide Izawa; Ryoichi Tsuchiya

SummaryA 27-year-old woman was admitted to Nagasaki University Hospital complaining of abdominal pain and fever. Percutaneous transhepatic cholangiography showed multiple cystic dilatations of the intrahepatic bile ducts without stone formation. The illness was diagnosed as a pure type of Caroli’s disease. No surgical intervention was made. Subsequently, the patient suffered repeated attacks of cholangitis, and six years later, computed tomography demonstrated cystic lesions of both lobes of the liver and stones within the cystic lesions of the right lobe. We collected 62 cases of Caroli’s disease reported in the Japanese literature, including our own case. Among them, cholangitis was found in 43.5%, hepatolithiasis in 30.6%, esophageal varices in 17.7% and cholangiocarcinoma in 8.1%. It is difficult to successfully treat Caroli’s disease involving both lobes of the liver. Long-term repeated cholangitis could lead to fibrosis of the liver, hepatolithiasis, portal hypertension and cholangiocarcinoma. Considering the above-mentioned aspects of the disease, careful follow-up studies are required in each case.


International Journal of Gastrointestinal Cancer | 1997

On the etymology of "pancreas".

Ryoichi Tsuchiya; Norio Fujisawa

SummaryIt is said that the pancreas was described first by Herophilus of Chalcedon in about 300bc, and the organ was named by Rufus of Ephesus in about 100ad. However, it is an established fact that the wordpancreas had been used by Aristotle (384–322bc) before Herophilus.In AristotlesHistoria Animalium, there is a line saying “another to the so-called pancreas”. It is considered bhat the words “so-called pancreas” imply that the word pancreas had been popular at the time of Aristotle, but it had not been authorized yet as an anatomical term. However, the wordpancreas presumably has been accepted as an anatomical term since Herophilus.


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

Prognosis of Resected Pancreatoduodenal Cancers.

Kazuhide Ura; Toshifumi Eto; Teiji Matsumoto; Tohru Segawa; Hikaru Fujioka; Masazumi Terada; Koichi Motojima; Kunihide Izawa; Tsukasa Tsunoda; Ryoichi Tsuchiya

1969年10月より1990年10月までに経験した膵頭領域癌 (十二指腸癌, 原発不明癌を除く) 切除例114例の予後および予後に関与する因子について検討した.症例の内訳は膵頭部癌55例, 乳頭部癌34例, 下部胆管癌25例であり, 平均年齢はそれぞれ64.0±11.7歳, 59.3±12.3歳, 62.1±11.5歳であった.このうち膵頭部癌の予後が最も悪く (p<0.01), 1年生存率は40%, 5年生存率は8%であった.乳頭部癌の予後は膵頭部癌に比べ比較的良好で1年生存率64%, 5年生存率31%であった.しかし進行したstage III以上の症例では予後不良で膵頭部癌とほとんど変わらない生存曲線を示した.下部胆管癌は最も予後良好であり, 1年生存率72%, 5年生存率44%であった.膵頭部癌では予後に最も関与したstage決定因子は膵後組織への浸潤 (Rp因子) であり, 術式では膵頭十二指腸切除術が膵全摘術より予後良好であった (p<0.05).乳頭部癌では膵臓浸潤 (Panc), 十二指腸浸潤 (D), リンパ節転移 (N) の各因子とも予後に関与したが, Panc因子が最も重要であった (p<0.001).下部胆管癌では各stage決定因子の有無で予後に有意差を認めなかったが, 組織学的リンパ節転移 (n) 1, 組織学的膵臓浸潤 (panc) 1, 組織学的十二指腸浸潤 (d) 1, 組織学的胆嚢浸潤 (ginf) 1にとどまっていれば比較的良好な予後が期待された.


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

An analysis of complications after total pelvic exenteration.

Yiqin Lin; Masato Furukawa; Toshinori Nakata; Toshiomi Kusano; Kazunori Tashiro; Seiichirou Watabe; Kaoru Itose; Hidetoshi Jouno; Tsukasa Tsunoda; Ryoichi Tsuchiya

過去11年8か月間に当科で経験した骨盤内臓全摘術12例の術後合併症について検討した. 性別は男性10例, 女性2例で, 原疾患はS状結腸・直腸癌9例, その他の悪性疾患3例であった. 1期手術7例, 2期手術5例で, 5年生存率は72%であった. 術後合併症では骨盤内膿瘍6例, 尿路感染症7例, イレウス5例などが主なものであった. 術後骨盤内膿瘍形成は, 術前からイレウス状態にあったもの, 術中出血量2,000ml以上の症例で多かった. またその予防のためには, 人工肛門などによるイレウス状態の改善と, 腫瘍摘出後の骨盤内死腔の十分なドレナージが必要であると思われた. 尿路感染症については尿管皮膚瘻で多発しており, 回腸導管が望ましいと考えられた.


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

A case report of cholangiocarcinoma after right hepatic trisegmentectomy.

Toshiomi Kusano; Masato Furukawa; Toshinori Nakata; Lin Yiqin; Kazunori Tashiro; Seiichiro Watabe; Tsukasa Tsunoda; Ryoichi Tsuchiya

1.は じめに り ,肝 内胆管へ浸潤が認められたが(Bl,VPl),肝 切 正常肝においては,切 除後の良好な肝再生が期待で 離 面に癌の浸潤はなくTW(一 )で治癒切除であった。 きることより,肝 硬変非併存の肝癌や肝門部胆管癌に 腫 瘍の組織像は良く分化した管状腺癌で,周 囲肝組 対してはその根治性を求めて肝の大量切除が数多く行 織 へ連続的に浸潤しつつあり,非 癌部には肝硬変はな われてきている。 今回,肝 内胆管細胞癌に対して肝右三区域切除術を 施行し,術 後 6か 月間肝の再生状態を画像診断的,病 理組織学的および免疫生化学的立場より観察した 1例 を経験 したので報告する。 2.対 象症例 症例は58歳の女性で,生 来健康,肝 炎の既往なく閉 塞性黄疸にて発症した。 術前画像診断 :術前の腹部断層 X線 検査 (CT)で は,直 径6cmの 腫瘍が肝門部から肝右葉へかけ存在 し,腫 瘍の背側は肝部下大静脈から右肝静脈にまたそ の左側は尾状葉に接 し,肝 左葉は代償性肥大を軽度示 していた (写真 1上 ).


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

Ultrasonic findings of metastatic liver carcinoma in comparison with gastric and colorectal cancer.

Goichi Ogawa; Takashi Yatsugi; Shigetoshi Morita; Toshifumi Eto; Toshimitsu Miyamoto; Kunihide Izawa; Noboru Harada; Ryoichi Tsuchiya

過去4年間に経験した胃癌および大腸癌の肝転移症例 (胃癌10例, 大腸癌14例) について, 転移巣ultrasonography (US) 像を比較検討した. 腫瘍の大きさは大腸癌 (4.6±1.3cm) の方が胃癌 (3.3±1.4cm) より有意に大きかった. 形状は両者ともに大きくなるにつれ球形からヤツガシラ形となる傾向を認めた (p<0.05). エコーレベルは両者とも低・等から高・混合エコーになる傾向を認めた (p<0.05). 境界US像は, 腫瘍側境界において胃癌では平滑~ こまかい凹凸が多く (8/10), 大腸癌ではあらい凹凸が多かった (6/14). 境界US像は腫瘍辺縁部における増殖形態を表し, 原発巣の性質を反映すると考えられるので境界部のUS所見の検討も重要であると思われた.


Jpn J Gastroenterol Surg, Nihon Shokaki Geka Gakkai zasshi | 1987

Clinical study of intrahepatic bile duct carcinoma.

Yasuharu Ohno; Kunihide Izawa; Tohru Oshibuchi; Nobuyoshi Ohta; Kensuke Yamamoto; Takashi Yamaguchi; Tsukasa Tsunoda; Ryozo Yoshino; Noboru Harada; Ryoichi Tsuchiya

肝内胆管癌15例の臨床像, 各種画像診断像につき検討した. 平均年齢は63±9.9歳であり, 男女比は1.5: 1であった.肝内結石合併例が6例, 手術既往例が2例をしめた. Ultrasonography像は境界不鮮明なhyperechoicでheterogenousな腫瘍エコーを呈することが多かった. computed tomography像はheterogenous pattemをもつlow density tumorとして描出された. CTは肝内結石合併例においても良好な診断率を示した. 血管造影ではencasement, stretching, neovascularization, 腫瘍欠損像, 門脈閉塞像が高率に認められた.リンパ節転移・肝内転移が高率に合併しており, 経門脈性肝内転移の存在が示唆され, 肝切除にあたっては広範なリンパ節郭清とともに系統的肝切除術が必要であると考えられた.


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

The pathological studies of hepatocellular carcinoma following transcatheter arterial embolization.

Tsutomu Tomioka; Kunihide Izawa; Ryoichi Tsuchiya; Noboru Harada; Ryozo Yoshino; Tsukasa Tsunoda; Takatoshi Noda; Takashi Yamaguchi; Kensuke Yamamoto; Kuniaki Hayashi; Hiromu Mori; Masataka Uetani

肝細胞癌に対する術前肝動脈塞栓術施行例25例と非施行例23例の病理学的検索を行った.スポンゼル単独使用群8例と, 抗癌剤併用群17例とは壊死率に差はなく, 手術を前提として肝動脈塞栓術を行う場合塞栓物質のみにて肝動脈塞栓術を行い早期に腫瘍を含む硬塞病変の切除を行うべきものと考えられた.壊死組織の診断には鍍銀染色が有用であり, 完全壊死例を含め肝細胞癌として特徴を示すものが多く診断価値があるものと考えられた, また肝動脈塞栓術から手術までの期間による組織修復過程は, 形態学的に経時的なパターンを示さなかった.これは結節の大きいものは修復過程の遅延が起るものと考えられた.

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