Takeo Iwama∥

6.4k total citations · 1 hit paper
125 papers, 4.3k citations indexed

About

Takeo Iwama∥ is a scholar working on Pathology and Forensic Medicine, Oncology and Surgery. According to data from OpenAlex, Takeo Iwama∥ has authored 125 papers receiving a total of 4.3k indexed citations (citations by other indexed papers that have themselves been cited), including 82 papers in Pathology and Forensic Medicine, 63 papers in Oncology and 37 papers in Surgery. Recurrent topics in Takeo Iwama∥'s work include Genetic factors in colorectal cancer (76 papers), Colorectal Cancer Treatments and Studies (31 papers) and Cancer Genomics and Diagnostics (21 papers). Takeo Iwama∥ is often cited by papers focused on Genetic factors in colorectal cancer (76 papers), Colorectal Cancer Treatments and Studies (31 papers) and Cancer Genomics and Diagnostics (21 papers). Takeo Iwama∥ collaborates with scholars based in Japan, United Kingdom and United States. Takeo Iwama∥'s co-authors include Michiko Miyaki, J. Utsunomiya, Yoshio Mishima, Joji Utsunomiya, Rei Kikuchi-Yanoshita, Motoko Konishi, M Imajo, K. Yaegashi, Nobuyuki Shitara and Ryuichi Hirayama and has published in prestigious journals such as Nature, Gastroenterology and Cancer.

In The Last Decade

Takeo Iwama∥

117 papers receiving 4.1k citations

Hit Papers

Total colectomy, mucosal proctectomy, and ileoanal anasto... 1980 2026 1995 2010 1980 100 200 300 400
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Total colectomy, mucosal proctectomy, and ileoanal anastomosis
    1980 494 citations J. Utsunomiya, Takeo Iwama∥ et al. Diseases of the Colon & Rectum profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Takeo Iwama∥ Japan 31 2.5k 2.2k 1.2k 1.2k 798 125 4.3k
Lucio Bertario Italy 39 3.0k 1.2× 2.8k 1.3× 862 0.7× 948 0.8× 1.0k 1.3× 127 4.8k
Gabriela Möslein Germany 31 2.9k 1.2× 2.0k 0.9× 815 0.7× 836 0.7× 1.1k 1.4× 100 4.1k
Ian Talbot United Kingdom 36 1.3k 0.5× 2.0k 0.9× 723 0.6× 1.1k 0.9× 420 0.5× 64 3.7k
Alessandra Viel Italy 32 2.0k 0.8× 1.7k 0.8× 1.3k 1.1× 381 0.3× 1.1k 1.4× 116 3.6k
Ian Tomlinson United Kingdom 30 1.6k 0.6× 1.2k 0.5× 1.4k 1.2× 372 0.3× 918 1.2× 48 3.2k
Dennis Salonga United States 24 630 0.3× 2.1k 1.0× 1.4k 1.2× 763 0.6× 546 0.7× 33 3.4k
Stanley R. Hamilton United States 17 1.0k 0.4× 1.3k 0.6× 2.1k 1.8× 309 0.3× 821 1.0× 20 3.6k
Minori Koshiji United States 29 638 0.3× 2.8k 1.3× 1.1k 0.9× 1.6k 1.4× 1.1k 1.3× 75 4.6k
Guido Nicolò Italy 29 444 0.2× 951 0.4× 987 0.8× 512 0.4× 644 0.8× 94 2.9k
K Smith United States 15 1.2k 0.5× 1.3k 0.6× 1.6k 1.3× 295 0.2× 889 1.1× 20 3.1k

Countries citing papers authored by Takeo Iwama∥

Since Specialization
Citations

This map shows the geographic impact of Takeo Iwama∥'s research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Takeo Iwama∥ with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Takeo Iwama∥ more than expected).

Fields of papers citing papers by Takeo Iwama∥

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Takeo Iwama∥. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Takeo Iwama∥. The network helps show where Takeo Iwama∥ may publish in the future.

Co-authorship network of co-authors of Takeo Iwama∥

This figure shows the co-authorship network connecting the top 25 collaborators of Takeo Iwama∥. A scholar is included among the top collaborators of Takeo Iwama∥ based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Takeo Iwama∥. Takeo Iwama∥ is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Ishida, Hideyuki, Keiichiro Ishibashi, & Takeo Iwama∥. (2017). Malignant tumors associated with juvenile polyposis syndrome in Japan. Surgery Today. 48(3). 253–263. 33 indexed citations
2.
Ishida, Hideyuki, Hiroyuki Baba, Takeo Iwama∥, et al.. (2016). Pancreas-sparing total duodenectomy for Spigelman stage IV duodenal polyposis associated with familial adenomatous polyposis: experience of 10 cases at a single institution. Familial Cancer. 16(1). 91–98. 12 indexed citations
3.
Tajima, Yusuke, Kensuke Kumamoto, Takeaki Matsuzawa, et al.. (2013). Pit Fall of First Screening of Lynch Syndrome from Medical Records. Nihon Gekakei Rengo Gakkaishi (Journal of Japanese College of Surgeons). 38(5). 944–949. 2 indexed citations
4.
Iwama∥, Takeo. (2009). NSAIDs and colorectal cancer prevention. Journal of Gastroenterology. 44(S19). 72–76. 30 indexed citations
5.
Iwama∥, Takeo. (2008). NSAIDs and cancer prevention. 105. 2 indexed citations
6.
Kuroda, Hiroyuki, et al.. (2008). A Case of Thyroid Cancers Associated with Familial Adenomatous Polyposis Detected during Follow-up after Prophylactic Colectomy. Nihon Daicho Komonbyo Gakkai Zasshi. 61(2). 62–70.
7.
Bevan, Steve, K Woodford-Richens, Paul Rozen, et al.. (1999). Screening SMAD1 , SMAD2 , SMAD3 , and SMAD5 for germline mutations in juvenile polyposis syndrome. Gut. 45(3). 406–408. 45 indexed citations
8.
Akiyama, Yoshimitsu, Ritsuko Iwanaga, Tomoko Ishikawa, et al.. (1996). Mutations of the transforming growth factor-β type II receptor gene are strongly related to sporadic proximal colon carcinomas with microsatellite instability. Cancer. 78(12). 2478–2484. 47 indexed citations
9.
Akiyama, Yoshimitsu, Hiromi Nagasaki, Zenro Nihei, et al.. (1996). Frequent Microsatellite Instabilities and Analyses of the Related Genes in Familial Gastric Cancers. Japanese Journal of Cancer Research. 87(6). 595–601. 40 indexed citations
10.
Lu, Shi‐Long, Yoshimitsu Akiyama, Hiromi Nagasaki, et al.. (1996). Loss or Somatic Mutations of hMSH2 Occur in Hereditary Nonpolyposis Colorectal Cancers with hMSH2 Germline Mutations. Japanese Journal of Cancer Research. 87(3). 279–287. 36 indexed citations
11.
Konishi, Motoko, Rei Kikuchi-Yanoshita, K Tanaka, et al.. (1996). Molecular nature of colon tumors in hereditary nonpolyposis colon cancer, familial polyposis, and sporadic colon cancer. Gastroenterology. 111(2). 307–317. 361 indexed citations
12.
Tomita, Hiroshi, et al.. (1996). Ampullary carcinoma in familial adenomatous polyposis: Report of a case. Surgery Today. 26(7). 522–526. 2 indexed citations
13.
Iwama∥, Takeo, et al.. (1994). Factors affecting the risk of rectal cancer following rectum-preserving surgery in patients with familial adenomatous polyposis. Diseases of the Colon & Rectum. 37(10). 1024–1026. 32 indexed citations
14.
Tomita, Hiroshi, Takeo Iwama∥, Keigo Yoshinaga, et al.. (1993). A case of ampullary carcinoma with familial adenomatous polyposis diagnosed by local excision of the ampulla of vater. Acta gastro-enterologica belgica. 35(7). 1602. 1 indexed citations
15.
Iwama∥, Takeo, Yoshio Mishima, & J. Utsunomiya. (1993). The Impact of Familial Adenomatous Polyposis on the Tumorigenesis and Mortality at the Several Organs. Annals of Surgery. 217(2). 101–108. 187 indexed citations
16.
Ishida, Hideyuki, et al.. (1992). An Experimental Study on Portal Vein Chemotherapy as a Prophylactic Treatment Against Liver Metastases.. The Japanese Journal of Gastroenterological Surgery. 25(1). 44–48. 2 indexed citations
17.
Endo, Mitsuo, et al.. (1992). Mutations in c-K-ras 2 gene codon 12 during colorectal tumorigenesis in familial adenomatous polyposis. Gastroenterology. 103(6). 1725–1731. 17 indexed citations
18.
19.
Utsunomiya, Joji, et al.. (1988). The Current Technique of Ileoanal Anastomosis. Digestive Surgery. 5(4). 207–214. 16 indexed citations
20.
Okamoto, Mieko, Masayuki Sasaki, Chieko Sato, et al.. (1988). Loss of constitutional heterozygosity in colon carcinoma from patients with familial polyposis coli. Nature. 331(6153). 273–277. 125 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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