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Dive into the research topics where Yasubumi Maruoka is active.

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Featured researches published by Yasubumi Maruoka.


Acta Histochemica Et Cytochemica | 2008

Thymidylate Synthase, Thymidine Phosphorylase and Orotate Phosphoribosyl Transferase Levels as Predictive Factors of Chemotherapy in Oral Squamous Cell Carcinoma

Yosuke Ogiuchi; Yasubumi Maruoka; Tomohiro Ando; Makio Kobayashi; Hideki Ogiuchi

We conducted a clinicopathologic study on protein and mRNA levels of thymidylate synthase (TS), thymidine phosphorylase (TP) and orotate phosphoribosyl transferase (OPRT) using biopsy tissue specimens before treatment. The mRNA levels have been measured in tumor cells microdissected from paraffin-embedded specimens (Danenberg Tumor Profile method: DTP method). We studied the mRNA and protein expression as effect predictive factors in chemotherapy. The subjects consisted of 20 cases of untreated oral squamous cell carcinoma who had undergone chemotherapy with TS-1 (16 males and 4 females, tongue in 8 cases, upper gingiva in 3 cases, lower gingiva in 3 cases, buccal mucosa in 5 cases and floor of the mouth in 1 case). TS gene expressions of the responders were lower than those for the nonresponders. Furthermore, regarding males who were less than 70 years of age, stage I and II, well differentiated type and tongue, TS mRNA expression of the responders were lower than that for the nonresponders. The mRNA expression of OPRT for the male responders was lower than that for the nonresponders. No remarkable difference was observed by immunohistochemistry. In this study, the measurement of the TS levels using the DTP method may potentially act as a predictive factor of antitumor effectiveness.


Journal of Japan Society for Oral Tumors | 1997

A case of buccal mucosal carcinoma with buccinator lymph node metastasis

Yasubumi Maruoka; Emiko Yokoo; Tomohiro Ando; Yoshikuni Sangu; Hideki Ogiuchi

口腔癌の頬リンパ節への転移はまれである。われわれは頬リンパ節転移を伴った頬粘膜癌の1例を経験したので報告する。患者は79歳男性で, 左頬部の腫脹を主訴に当科を受診した。頬部に拇指大, 弾性硬の腫瘤がみられ, CT所見では頬筋に接した, high density massを認め, exciosional biopsyを施行したところ転移性扁平上皮癌と病理診断されたため, 入院し頭頚部管腔の内視鏡検査を行ったところ, 左頬粘膜に16×12mmの潰瘍が認められた。生検の結果, 頬粘膜扁平上皮癌 (TINIMO, Stage III) と診断し, 放射線治療 (60Gy) を施行し腫瘍は消失した。しかし外来経過観察中に, 左顎下リンパ節転移を認めたため, 再入院し左全頚部郭清術を施行した。現在外来で経過観察しているが, 再発転移なく良好である。


Journal of Japan Society for Oral Tumors | 1993

Immunohistochemical study of autopsy cases with oral squamous cell carcinoma.

Emiko Yokoo; Yasubumi Maruoka; Ken Rokukawa; Yosikuni Sangu; Hideki Ogiuchi; Masaki Shimono

口腔扁平上皮癌剖検例10例について, 免疫組織化学的検討を行った。症例は, 男性5例, 女性5例で, 年齢は39~88歳, 原発部位は頬粘膜4例, 舌3例, 上顎2例, 軟口蓋1例で, 病期分類はstage II1例, III2例, IV7例であった。治療法は, 外科+放射線療法5例, 外科+放射線+化学療法4例, 放射線+化学療法1例で, 生存期間は7か月~38年であった。高分化型4例, 中分化型4例, 低分化型2例で, 細胞異型および構造異型は8例で認められた。浸潤様式は2型, 3型各1例, 4C型5例, 4D型3例であった。間質反応のリンパ球浸潤の程度は, 認められないもの3例, 軽度6例, 高度1例であった。CEAとkeratinは, 全例陽性であったが, その局在は症例により差がみられた。SCCは, 低分化型の1例を除き, 全例陽性であった。SCC, CEA, ケラチンの局在は腫瘍細胞の分化の程度を示す指標となると思われた。


Acta Histochemica Et Cytochemica | 2002

Expression of Vascular Endothelial Growth Factor (VEGF) and Specific Receptors (Flt-1 and Flk-1) in Rat Tongue Carcinogenesis Induced by 4-Nitroquinoline 1-Oxide

Masayuki Maejima; Yasubumi Maruoka; Tatsuo Sawada; Tomohiro Ando; Makio Kobayashi; Hideki Ogiuchi


日本口腔診断学会雑誌 = Japanese journal of oral diagnosis/oral medicine | 2009

A Case of Severe Tongue Ulceration Caused by Long-term Dosage of Nicorandil

Seigo Morita; Toshiyuki Kataoka; Akira Kumasaka; Yumiko Momoki; Yasubumi Maruoka; Tomohiro Ando


Japanese Journal of Oral & Maxillofacial Surgery | 2002

A case of papillary cystadenoma of the retromolar region

Shuichi Fujishiro; Tomohiro Ando; Yasubumi Maruoka; Yousuke Ogiuchi; Makoto Hoshino; Hideki Ogiuchi


日本口腔診断学会雑誌 = Japanese journal of oral diagnosis/oral medicine | 2005

Squamous Cell Carcinoma of the Tongue in Patients Less than Forty

Yasubumi Maruoka; Tomohiro Ando; Yosuke Ogiuchi; Seigo Morita; Takashi Yamamura; Hideki Ogiuchi


Japanese jornal of Head and Neck Cancer | 2003

CLINICAL STUDY ON N0-STAGE TONGUE CANCER

Yasubumi Maruoka; Tomohiro Ando; Makoto Hoshino; Yoshikuni Sangu; Hideki Ogiuchi


Japanese Journal of Oral & Maxillofacial Surgery | 2002

A case of angiokeratoma of the tongue

Makoto Hoshino; Tomohiro Ando; Kanako Nakamura; Yasubumi Maruoka; Noboru Nishihara; Hideki Ogiuchi


Japanese Journal of Oral & Maxillofacial Surgery | 1996

Management and outcome of 73 patients with tongue cancer

Tomohiro Ando; Atsushi Onaka; Yasubumi Maruoka; Takashi Yamazaki; Takaho Kuwazawa; Hideki Ogiuchi

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Emiko Yokoo

Tokyo Medical and Dental University

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Makio Kobayashi

University of Texas Southwestern Medical Center

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Kengo Iwasaki

Tokyo Medical and Dental University

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