Masaru Oba

596 total citations
30 papers, 400 citations indexed

About

Masaru Oba is a scholar working on Oncology, Hepatology and Surgery. According to data from OpenAlex, Masaru Oba has authored 30 papers receiving a total of 400 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Oncology, 19 papers in Hepatology and 16 papers in Surgery. Recurrent topics in Masaru Oba's work include Hepatocellular Carcinoma Treatment and Prognosis (19 papers), Colorectal Cancer Treatments and Studies (17 papers) and Cholangiocarcinoma and Gallbladder Cancer Studies (11 papers). Masaru Oba is often cited by papers focused on Hepatocellular Carcinoma Treatment and Prognosis (19 papers), Colorectal Cancer Treatments and Studies (17 papers) and Cholangiocarcinoma and Gallbladder Cancer Studies (11 papers). Masaru Oba collaborates with scholars based in Japan and United States. Masaru Oba's co-authors include Kiyoshi Hasegawa, Norihiro Kokudo, Masatoshi Makuuchi, Yoshihiro Sakamoto, Junichi Shindoh, Yasuhiko Sugawara, Taku Aoki, Yutaka Matsuyama, Yoshihiro Mise and Michiro Takahashi and has published in prestigious journals such as Journal of Clinical Oncology, PLoS ONE and Cancer.

In The Last Decade

Masaru Oba

24 papers receiving 397 citations

Peers

Masaru Oba
William L. Horvath United States
Julien Leporrier France
Xiaoluan Yan China
Ki Young Yang South Korea
S. Tsousis Greece
N. Frickhofen Germany
Siong S Liau United Kingdom
A. Ciarlo Italy
Makiko Hiratsuka Japan
Javier Sastre Valera Spain
William L. Horvath United States
Masaru Oba
Citations per year, relative to Masaru Oba Masaru Oba (= 1×) peers William L. Horvath

Countries citing papers authored by Masaru Oba

Since Specialization
Citations

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

Fields of papers citing papers by Masaru Oba

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masaru Oba

This figure shows the co-authorship network connecting the top 25 collaborators of Masaru Oba. A scholar is included among the top collaborators of Masaru Oba 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 Masaru Oba. Masaru Oba 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.
Takahashi, Atsushi, Ryuji Yoshioka, Masaru Oba, et al.. (2022). Sequential therapy of portal vein embolization and systemic chemotherapy for locally advanced perihilar biliary tract cancer. European Journal of Surgical Oncology. 49(1). 150–155. 5 indexed citations
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Kokudo, Takashi, Akio Saiura, Tadatoshi Takayama, et al.. (2021). Adjuvant chemotherapy can prolong recurrence-free survival but did not influence the type of recurrence or subsequent treatment in patients with colorectal liver metastases. Surgery. 170(4). 1151–1154. 13 indexed citations
4.
Mise, Yoshihiro, Kiyoshi Hasegawa, Akio Saiura, et al.. (2020). A Multicenter Phase 2 Trial to Evaluate the Efficacy of mFOLFOX6 + Cetuximab as Induction Chemotherapy to Achieve R0 Surgical Resection for Advanced Colorectal Liver Metastases (NEXTO Trial). Annals of Surgical Oncology. 27(11). 4188–4195. 3 indexed citations
5.
Takahashi, Michiro, Kiyoshi Hasegawa, Masaru Oba, et al.. (2016). Phase 1 study on S-1 and oxaliplatin therapy as an adjuvant after hepatectomy for colorectal liver metastases. Investigational New Drugs. 34(4). 468–473. 1 indexed citations
6.
Hasegawa, Kiyoshi, Akio Saiura, Tadatoshi Takayama, et al.. (2016). Adjuvant Oral Uracil-Tegafur with Leucovorin for Colorectal Cancer Liver Metastases: A Randomized Controlled Trial. PLoS ONE. 11(9). e0162400–e0162400. 80 indexed citations
7.
Nishioka, Yujiro, Junichi Shindoh, Ryuji Yoshioka, et al.. (2015). Radiological Morphology of Colorectal Liver Metastases after Preoperative Chemotherapy Predicts Tumor Viability and Postoperative Outcomes. Journal of Gastrointestinal Surgery. 19(9). 1653–1661. 19 indexed citations
8.
Oba, Masaru, Kiyoshi Hasegawa, Junichi Shindoh, et al.. (2015). Survival benefit of repeat resection of successive recurrences after the initial hepatic resection for colorectal liver metastases. Surgery. 159(2). 632–640. 62 indexed citations
9.
Takahashi, Michiro, Kiyoshi Hasegawa, Masaru Oba, et al.. (2015). Repeat resection leads to long-term survival: analysis of 10-year follow-up of patients with colorectal liver metastases. The American Journal of Surgery. 210(5). 904–910. 23 indexed citations
10.
Osumi, Hiroki, Eiji Shinozaki, Masahiko Osako, et al.. (2015). Cetuximab treatment for metastatic colorectal cancer with KRAS p.G13D mutations improves progression-free survival. Molecular and Clinical Oncology. 3(5). 1053–1057. 12 indexed citations
11.
Kawaguchi, Yoshikuni, Kiyoshi Hasegawa, Akio Saiura, et al.. (2014). Surgical resection for local recurrence after radiofrequency ablation for colorectal liver metastasis is more extensive than primary resection. Scandinavian Journal of Gastroenterology. 49(5). 569–575. 5 indexed citations
12.
Saiura, Akio, Junji Yamamoto, Kiyoshi Hasegawa, et al.. (2014). A combination of oral uracil-tegafur plus leucovorin (UFT + LV) is a safe regimen for adjuvant chemotherapy after hepatectomy in patients with colorectal cancer: Safety report of the UFT/LV study. Drug Discoveries & Therapeutics. 8(1). 48–56. 13 indexed citations
13.
Oba, Masaru, Kiyoshi Hasegawa, Yutaka Matsuyama, et al.. (2014). Discrepancy Between Recurrence-Free Survival and Overall Survival in Patients with Resectable Colorectal Liver Metastases: A Potential Surrogate Endpoint for Time to Surgical Failure. Annals of Surgical Oncology. 21(6). 1817–1824. 68 indexed citations
14.
Yoshioka, Ryuji, Kiyoshi Hasegawa, Yoshihiro Mise, et al.. (2013). Evaluation of the safety and efficacy of simultaneous resection of primary colorectal cancer and synchronous colorectal liver metastases. Surgery. 155(3). 478–485. 31 indexed citations
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Oba, Masaru, Keisho Chìn, Yoshimasa Kawazoe, et al.. (2011). Availability of irinotecan in a second-line setting confers survival benefit to patients with advanced gastric cancer refractory to fluoropyrimidine-based regimens. Oncology Letters. 2(2). 247–251. 1 indexed citations
17.
Tokudome, Nahomi, Yoshinori Ito, Shunji Takahashi, et al.. (2011). Detection of circulating tumor cells in peripheral blood of heavily treated metastatic breast cancer patients. Breast Cancer. 18(3). 195–202. 13 indexed citations
18.
Oba, Masaru, et al.. (2008). Chemoprevention of glandular stomach carcinogenesis through duodenogastric reflux in rats by a COX‐2 inhibitor. International Journal of Cancer. 123(7). 1491–1498. 12 indexed citations
19.
Oba, Masaru, et al.. (2008). A case of lymphocytic mastopathy requiring differential diagnosis from primary breast lymphoma. Breast Cancer. 16(2). 141–146. 3 indexed citations
20.
Oba, Masaru, et al.. (2007). THREE CASES OF CARCINOMA OF THE REMNANT STOMACH AFTER PROXIMAL GASTRECTOMY FOR GASTRIC CANCER. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 68(4). 850–855.

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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