Author

Yasuo Koyama

Observed names: Y Koyama, Y. KOYAMA, Y. Koyama, YASUO KOYAMA, M.A.G., YASUO KOYAMA, M.D., Yasuo KOYAMA

Observed institutions: Kansai Medical University, Jichi Medical University, National Cancer Centre Japan, National Cancer Center, Kindai University Hospital, Tochigi Cancer Center, The Cancer Institute Hospital, National Medical Center, Osaka University Hospital, National Cancer Center Hospital, National Cancer Center Hospital, Nagoya University, The University of Osaka

OpenAlex ID: A5078466902

Significance of lateral node dissection for advanced rectal carcinoma at or below the peritoneal reflection

1989 · Yoshihiro Moriya, Keiichi Hojo, et al. · Diseases of the Colon & Rectum · 283

Lymphatic spread and its prognostic value in patients with rectal cancer

1982 · Keiichi Hojo, Yasuo Koyama, et al. · The American Journal of Surgery · 243

Extensive methylation of hMLH1 promoter region predominates in proximal colon cancer with microsatellite instability

2001 · Yasuyuki Miyakura, Kokichi Sugano, et al. · Gastroenterology · 203

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Changes in colorectal cancer during a 20-year period: an extended report from the multi-institutional registry of large bowel cancer, Japan.

2003 · Kenjiro Kotake, Satoshi Honjo, et al. · PubMed · 104

Changing Site Distribution of Colorectal Cancer in Japan

2002 · Hideho Takada, Tsunehide Ohsawa, et al. · Diseases of the Colon & Rectum · 94

Lesions associated with familial polyposis coli: Studies of lesions of the stomach, duodenum, bones, and teeth

1976 · Kyosuke Ushio, Michizo Sasagawa, et al. · Abdominal Imaging · 89

Relation of Family History of Cancer and Environmental Factors to the Risk of Colorectal Cancer: A Case-control Study

1995 · Kenjiro Kotake, Yasuo Koyama, et al. · Japanese Journal of Clinical Oncology · 74

Colorectal cancer statistics in Japan: data from JSCCR registration, 1974–1993

2001 · T. Muto, K. Kotake, et al. · International Journal of Clinical Oncology · 72

An aggressive therapeutic approach to carcinoma of the body and tail of the pancreas

1996 · Hideo Ozaki, Taira Kinoshita, et al. · Cancer · 70

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Prognostic factors for patients with colon or rectal carcinoma treated with resection only: Five-year follow-up report

1996 · Takeshi Tominaga, Takashi Sakabe, et al. · Cancer · 69

The effectiveness of wide anatomical resection and radical lymphadenectomy for patients with rectal cancer

1982 · Keiichi Hojo, Yasuo Koyama · Surgery Today · 66

Studies of Intestinal Metaplasia in the Gastric Mucosa by Detection of Disaccharidases With “Tes-Tape”2

1974 · Takashi Kawachi, Kikuko Kogure, et al. · JNCI Journal of the National Cancer Institute · 59

Prognostic Factors of Colorectal Cancer: Results of Multivariate Analysis of Curative Resection Cases With or Without Adjuvant Chemotherapy

1996 · T. Takahashi, T. Kato, et al. · American Journal of Clinical Oncology · 56

Family Environment, Hobbies and Habits as Psychosocial Predictors of Survival for Surgically Treated Patients with Breast Cancer

1998 · K. Tominaga, J. Andow, et al. · Japanese Journal of Clinical Oncology · 51

Overview of colorectal cancer in Japan: Report from the registry of the Japanese Society for Cancer of the Colon and Rectum

1997 · Yasuo Koyama, Kenjiro Kotake · Diseases of the Colon & Rectum · 50

The bulbar vesico‐relaxer center and the bulbo‐sacral connections arising from it a study of the function of the ventral reticulo‐spinal tract

1960 · Masaru Kuru, Yasuo Koyama, et al. · The Journal of Comparative Neurology · 39

Postoperative follow-up studies on cancer of the colon and rectum

1982 · Keiichi Hojo, Yasuo Koyama · The American Journal of Surgery · 33

A Case‐Control Study of Stomach Cancer and Its Genesis in Relation to Alcohol Consumption, Smoking, and Familial Cancer History

1991 · Keigo Tominaga, Yasuo Koyama, et al. · Japanese Journal of Cancer Research · 30

The Bulbar vesico‐constrictor center and the bulbo‐sacral connections arising from it. A study of the function of the lateral reticulo‐spinal tract

1959 · Masaru Kuru, Takesi Kurati, et al. · The Journal of Comparative Neurology · 28

Relative and Combined Performance of Mammography and Ultrasonography for Breast Cancer Screening in the General Population: a Pilot Study in Tochigi Prefecture, Japan

2007 · S. Honjo, J. Ando, et al. · Japanese Journal of Clinical Oncology · 27

Methylation profile of the MLH1 promoter region and their relationship to colorectal carcinogenesis

2002 · Yasuyuki Miyakura, Kokichi Sugano, et al. · Genes Chromosomes and Cancer · 24

Two Cases of Cancer of the Pancreatic Body Undergoing Gastric Preservation with Distal Pancreatectomy Combined with Resection of the Celiac Axis.

1991 · Shoichi Hishinuma, Yoshiro Ogata, et al. · 日本消化器外科学会雑誌 · 23

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Fiber connections between the mesencephalic micturition facilitatory area and the bulbar vesico‐motor centers

1961 · Masaru Kuru, Akira Makuya, et al. · The Journal of Comparative Neurology · 17

Adenosquamous Cell Carcinoma of the Colon with Severe Hypercalcemia —Report of Two Cases—

1980 · HITOSHI KUBOTA, M.D., YASUO KOYAMA, M.D., et al. · Japanese Journal of Clinical Oncology · 16

Absorption and Excretion of a New Oral Antitumor Drug, 1-Hexylcarbamoyl-5-Fluorouracil (HCFU), in Cancer Patients

1980 · Yasuo Koyama, Hisanobu Niitani, et al. · Japanese Journal of Clinical Oncology · 13

Works count: 103

Citation count: 1,949

H-index: 22

I10-index: 25