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Featured researches published by Satoshi Umezawa.


International Journal of Clinical Oncology | 1996

Chemotherapy for ovarian clear cell adenocarcinoma with irinotecan hydrochloride and mitomycin C

Satoshi Umezawa; Yoshio Shimizu; Nobuhiro Takeshima; Katsuhiko Hasumi

BackgroundNo effective chemotherapy has been established for the treatment of ovarian clear cell adenocarcinomas. Based on the results of a sensitivity test in cultured cells, we investigated combination chemotherapy using irinotecan hydrochloride and mitomycin C.MethodsSix patients with ovarian clear cell, adenocarcinoma and evaluative lesions were infused with irinotecan (140 mg/m2) intravenously over 4 hours and mitomycin C (7 mg/m2) was infused over 60 minutes directly into the pleuroperitoneal cavity or intravenously. One course comprised 3 doses of each agent at 2-week intervals and patients received at least 2 courses.ResultsA complete response was obtained in 1 patient (maintained for 12 months so far) and a partial response in 1 patient (maintained for 3 months and followed by relapse with peritoneal dissemination). In 3 of the 4 patients without tumor regression, carcinomatous effusions decreased or disappeared. Myelosuppression and gastrointestinal side effects were grade II or less in severity and thus were considered tolerable.ConclusionBecause no chemotherapy regimens employing cisplatin are effective for ovarian clear cell adenocarcinomas, this regimen warrants further study.


The Journal of the Japanese Society of Clinical Cytology | 2001

Presumptive histologic diagnosis of stage III or IV epithelial ovarian cancer by ascites cytology.

Tomoyasu Kato; Kahori Shimizu; Yuji Arai; Hideo Teshima; Satoshi Umezawa; Yoshio Shimizu; Masafumi Tsuzuku; Kazuhiro Yamauchi; Katsuhiko Hasumi

目的:III, IV期上皮性卵巣癌の腹水細胞診における各組織型に特徴的な集塊に注目し, 腹水細胞診による組織型推定の可能性を検討した.方法:1991年から1996年までに腹水細胞診を施行したIII, IV期卵巣癌91例のPapanicolaou染色標本を対象とした.成績:腹水細胞診陽性は67例 (74%) あり, 組織型別では漿液性腺癌が54例中44例 (82%), 明細胞腺癌が18例中14例 (78%), 粘液性腺癌が12例中7例 (58%), 類内膜腺癌が7例中2例 (29%) であった. 漿液性腺癌の特徴は100個以上の小型細胞から成る大型の乳頭状集塊で33例 (75%) にみられ, うち16例 (49%) はその集塊内に砂粒体を伴っていた. 明細胞腺癌では, 14例中10例 (71%) にmirror ball patternを示す集塊, 8例 (56%) に間質の石灰化を認めた. 粘液性腺癌ではシート状の集塊と細胞質内の粘液が全例にみられた. 類内膜腺癌の特徴は管腔状集塊であった. 上記の特徴的集塊の出現頻度は67例中52例 (78%) であった.結論:腹水細胞診はIII, IV期上皮性卵巣癌の組織型推定に有用と考えられた.


The Journal of the Japanese Society of Clinical Cytology | 1998

A case of cervical adnosoquamous carcinoma detected by peritoneal cytology at the operation.

Satoshi Umezawa; Atsuko Minami; Takayuki Ishiya; Yasuo Hirai; Hideo Teshima; Kazuhiro Yamauchi; Masafumi Tsuzuku; Katsuhiko Hasumi

子宮頸部扁平上皮癌の診断で化学療法後, 開腹手術時に行われた腹水細胞診で腺癌細胞を認めた1症例を経験したので報告する.症例は64歳女性で, 子宮頸部組織生検による治療前の診断は, 扁平上皮癌 (大細胞非角化型) であった.抗癌剤による化学療法後, 手術開腹時の腹水細胞診にて扁平上皮癌, 腺癌両方の悪性細胞を認めた.治療前のヘマトキシリン-エオジン染色 (H-E) 組織標本では, 腺管構造は認めなかった.しかし, PAS/Alcian-Blue染色を行った結果, 少数であるが陽性細胞を同定できた.この結果から本症例が, 組織学的には腺管構造のない粘液産生能を有する腺癌成分を有する腺扁平上皮癌であると考えられた.本症例は子宮頸部擦過細胞標本での腺癌成分の混在が推定され, 術中腹水細胞診では明らかな粘液産生細胞が同定された.組織標本では腺管構造をもたないが粘液産生能のある腺癌成分の診断に細胞診が有用と思われた.


Gynecologic Oncology | 1994

Combined assay of serum levels of CA125 and CA19-9 in endometrial carcinoma.

Nobuhiro Takeshima; Yoshio Shimizu; Satoshi Umezawa; Yasuo Hirai; Jui-Tung Chen; Fujimoto I; Kazuhiro Yamauchi; Katsuhiko Hasumi


Gynecologic Oncology | 2004

Clinicopathologic features of villoglandular papillary adenocarcinoma of the uterine cervix

Kuniko Utsugi; Yoshio Shimizu; Futoshi Akiyama; Satoshi Umezawa; Katsuhiko Hasumi


Oncology Letters | 2012

Ovarian cancer complicated by pregnancy: Analysis of 10 cases.

Mamiko Dobashi; Seiji Isonishi; Asuka Morikawa; Kazuaki Takahashi; Kazu Ueda; Satoshi Umezawa; Yoichi Kobayashi; Mitsutoshi Iwashita; Kimihiro Takechi; Tadao Tanaka


International Journal of Clinical Oncology | 2017

Histologic grade and peritoneal cytology as prognostic factors in type 1 endometrial cancer

Kei Tanaka; Yoichi Kobayashi; Juri Sugiyama; Tatsuo Yamazaki; Kei Dozono; Momoe Watanabe; Hiromi Shibuya; Yoshiko Nishigaya; Mai Momomura; Hironori Matsumoto; Satoshi Umezawa; Kiyoshi Takamatsu; Mitsutoshi Iwashita


The Journal of the Japanese Society of Clinical Cytology | 1994

The clinical usefulness of the endometrial cytology using Masubuchi's aspiration tubes in ovarian and fallopian tube cancer.

Nobuhiro Takeshima; Hideo Teshima; Atsuko Minamp; Katsuyoshi Katase; Satoshi Umezawa; Yoshio Shimizu; Fujimoto I; Kazuhiro Yamauchi; Katsuhiko Hasumi; Masahumi Tsuzuku


The Journal of the Japanese Society of Clinical Cytology | 1999

Preoperative cytological diagnosis of uterine sarcoma.

Shigeyuki Okano; Yasuo Hirai; Satoshi Umezawa; Reiko Nemoto; Yuji Arai; Nobuhiro Takeshima; Masafumi Tsuzuku; Katsuhiko Hasumi


The Journal of the Japanese Society of Clinical Cytology | 1998

Clinicocytological features of endometrial clear-cell adenocarcinoma and mixed carcinoma with a clear-cell component.

Takayuki Ishiya; Atsuko Minami; Hideo Teshima; Satoshi Umezawa; Kimihiro Nagai; Kaori Shimizu; Yasuo Hirai; Kazuhiro Yamauchi; Masafumi Tsuzuku; Katsuhiko Hasumi

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Katsuhiko Hasumi

Japanese Foundation for Cancer Research

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Yoshio Shimizu

Japanese Foundation for Cancer Research

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Kuniko Utsugi

Japanese Foundation for Cancer Research

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Nobuhiro Takeshima

Japanese Foundation for Cancer Research

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Fujimoto I

Japanese Foundation for Cancer Research

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Tomoyasu Kato

Tokyo Medical and Dental University

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