Ryohei Izumi

1.7k total citations
54 papers, 1.4k citations indexed

About

Ryohei Izumi is a scholar working on Surgery, Oncology and Epidemiology. According to data from OpenAlex, Ryohei Izumi has authored 54 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Surgery, 14 papers in Oncology and 9 papers in Epidemiology. Recurrent topics in Ryohei Izumi's work include Cholangiocarcinoma and Gallbladder Cancer Studies (13 papers), Hepatocellular Carcinoma Treatment and Prognosis (8 papers) and Pancreatic and Hepatic Oncology Research (6 papers). Ryohei Izumi is often cited by papers focused on Cholangiocarcinoma and Gallbladder Cancer Studies (13 papers), Hepatocellular Carcinoma Treatment and Prognosis (8 papers) and Pancreatic and Hepatic Oncology Research (6 papers). Ryohei Izumi collaborates with scholars based in Japan. Ryohei Izumi's co-authors include Masao Yagi, Osamu Matsui, K Shimizu, Yasuni Nakanuma, Tsutomu Takashima, Kenichi Kobayashi, Osamu Matsui, A Nonomura, Jun Yoshikawa and Masashi Unoura and has published in prestigious journals such as Gastroenterology, Hepatology and Radiology.

In The Last Decade

Ryohei Izumi

50 papers receiving 1.3k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ryohei Izumi Japan 14 895 505 414 244 213 54 1.4k
Susumu Yamazaki Japan 10 826 0.9× 465 0.9× 423 1.0× 162 0.7× 128 0.6× 24 1.0k
Wan-Yee Lau Hong Kong 12 459 0.5× 469 0.9× 311 0.8× 444 1.8× 177 0.8× 15 1.2k
Yukihiro Koike Japan 14 1.9k 2.1× 1.3k 2.5× 473 1.1× 251 1.0× 256 1.2× 31 2.2k
Takashi Shuto Japan 21 434 0.5× 488 1.0× 470 1.1× 133 0.5× 187 0.9× 96 1.3k
Shogo Nakano Japan 15 298 0.3× 209 0.4× 270 0.7× 211 0.9× 150 0.7× 65 981
Anfeng Si China 18 602 0.7× 300 0.6× 523 1.3× 364 1.5× 329 1.5× 33 1.2k
Yasuji Ryu Japan 16 690 0.8× 373 0.7× 242 0.6× 80 0.3× 134 0.6× 30 1.1k
Takeshi Mitsui Japan 17 484 0.5× 234 0.5× 669 1.6× 357 1.5× 293 1.4× 47 1.3k
Roman Rieger Austria 14 406 0.5× 367 0.7× 536 1.3× 322 1.3× 184 0.9× 22 1.7k
Christian Wittekind Germany 17 415 0.5× 200 0.4× 535 1.3× 333 1.4× 230 1.1× 43 1.0k

Countries citing papers authored by Ryohei Izumi

Since Specialization
Citations

This map shows the geographic impact of Ryohei Izumi'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 Ryohei Izumi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryohei Izumi more than expected).

Fields of papers citing papers by Ryohei Izumi

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryohei Izumi. 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 Ryohei Izumi. The network helps show where Ryohei Izumi may publish in the future.

Co-authorship network of co-authors of Ryohei Izumi

This figure shows the co-authorship network connecting the top 25 collaborators of Ryohei Izumi. A scholar is included among the top collaborators of Ryohei Izumi 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 Ryohei Izumi. Ryohei Izumi 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.
2.
Yagi, Yasumichi, Itsuro Terada, Wataru Fukushima, et al.. (2015). Massive pneumoretroperitoneum arising from emphysematous cholecystitis: a case report and the literature review. BMC Gastroenterology. 15(1). 114–114. 5 indexed citations
3.
4.
Nojima, N, et al.. (2014). Currarino syndrome in an adult presenting with a presacral abscess: a case report. Journal of Medical Case Reports. 8(1). 77–77. 8 indexed citations
5.
Ueda, Nobuhiko, et al.. (1996). A Case of Cholesterol Hepatolithiasis with Multiple Cholesterin Granulomas.. The Japanese Journal of Gastroenterological Surgery. 29(8). 1792–1796. 2 indexed citations
6.
Izumi, Ryohei, et al.. (1995). Effects of Electrical Stimulation of Cervical Sympathetic Trunks on Microcirculation in the Facial Nerve.. The Japanese Journal of Physiology. 45(5). 801–809. 5 indexed citations
7.
Izumi, Ryohei, Kouichi Shimizu, Masao Yagi, et al.. (1994). Postoperative adjuvant hepatic arterial infusion of lipiodol containing anticancer drugs in patients with hepatocellular carcinoma. Hepatology. 20(2). 295–301. 114 indexed citations
8.
Izumi, Ryohei, et al.. (1994). Prognostic factors of hepatocellular carcinoma in patients undergoing hepatic resection. Gastroenterology. 106(3). 720–727. 320 indexed citations
9.
Izumi, Ryohei, et al.. (1993). Protective effect of AA-861 (5-lipoxygenase inhibitor) on experimental acute necrotizing pancreatitis in rats. International Journal of Pancreatology. 13(3). 201–8. 5 indexed citations
10.
Izumi, Ryohei, K Shimizu, Tetsuo Hashimoto, et al.. (1992). Alpha‐fetoprotein production by hepatocellular carcinoma is prognostic of poor patients survival. Journal of Surgical Oncology. 49(3). 151–155. 41 indexed citations
11.
Shimizu, Kouichi, et al.. (1991). Surgical Treatment for Chronic Pancreatitis: Results of Pancreatic Duct Drainage Operation and Pancreatic Resection.. The Japanese Journal of Gastroenterological Surgery. 24(10). 2654–2658. 1 indexed citations
12.
Matsui, Osamu, M Kadoya, Tadamitsu Kameyama, et al.. (1991). Benign and malignant nodules in cirrhotic livers: distinction based on blood supply.. Radiology. 178(2). 493–497. 468 indexed citations
13.
Yamaguchi, Akio, Tetsuya Ishida, Shigeru Takegawa, et al.. (1990). Flow-Cytometric Analysis of Colorectal Cancer with Hepatic Metastases and Its Relationship to Metastatic Characteristics and Prognosis. Oncology. 47(6). 478–482. 18 indexed citations
14.
Nagakawa, Takukazu, Keiichi Ueno, Tetsuo Ohta, et al.. (1990). Appraisal of extended operation for carcinoma of the pancreas and biliary tract observated from quality of life.. The Japanese Journal of Gastroenterological Surgery. 23(4). 967–972. 1 indexed citations
15.
Motoo, Yoshiharu, et al.. (1989). Immunohistochemical analysis of EGF receptor and myc product in human hepatoma cells.. Kanzo. 30(2). 261–262. 3 indexed citations
16.
Notsumata, Kazuo, Nobuyoshi Tanaka, Kenichi Kobayashi, et al.. (1988). A case of non-cirrhotic portal hypertension with occluded centrtal veins which was caused by pyrrolizidine alkaloid in an herb tea.. Kanzo. 29(3). 394–399. 1 indexed citations
17.
Nonomura, Akitaka, Goroku Ohta, Yasuni Nakanuma, et al.. (1988). Simultaneous detection of epidermal growth factor receptor (EGF‐R), epidermal growth factor (EGF) and ras p21 in cholangiocarcinoma by an immunocytochemical method. Liver International. 8(3). 157–166. 43 indexed citations
18.
Ohta, Tetsuo, Takukazu Nagakawa, Ichiro Konishi, et al.. (1988). Clinical experience of intrahepatic cholangiocarcinoma associated with hepatolithiasis. Surgery Today. 18(1). 47–53. 25 indexed citations
19.
Motoo, Yoshiharu, Nobuyoshi Tanaka, Kenichi Kobayashi, et al.. (1987). A resected case of hepatocellular carcinoma which developed during a follow-up of lupoid hepatitis.. Kanzo. 28(4). 472–476. 1 indexed citations
20.
Miyazaki, Itsuo, et al.. (1985). Hepatic resection for hepatocellular carcinoma accompanied with liver cirrhosis.. The Japanese Journal of Gastroenterological Surgery. 18(7). 1659–1663. 1 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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