Ayumi Shikama

611 total citations
33 papers, 318 citations indexed

About

Ayumi Shikama is a scholar working on Oncology, Reproductive Medicine and Obstetrics and Gynecology. According to data from OpenAlex, Ayumi Shikama has authored 33 papers receiving a total of 318 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Oncology, 12 papers in Reproductive Medicine and 10 papers in Obstetrics and Gynecology. Recurrent topics in Ayumi Shikama's work include Ovarian cancer diagnosis and treatment (12 papers), Endometrial and Cervical Cancer Treatments (10 papers) and Cancer Immunotherapy and Biomarkers (4 papers). Ayumi Shikama is often cited by papers focused on Ovarian cancer diagnosis and treatment (12 papers), Endometrial and Cervical Cancer Treatments (10 papers) and Cancer Immunotherapy and Biomarkers (4 papers). Ayumi Shikama collaborates with scholars based in Japan, United States and Taiwan. Ayumi Shikama's co-authors include Toyomi Satoh, Takeo Minaguchi, Hiroyuki Ochi, M Sakurai, Nobutaka Tasaka, Azusa Akiyama, Sari Nakao, Hiroyuki Yoshikawa, Koji Matsumoto and Mamiko Onuki and has published in prestigious journals such as PLoS ONE, British Journal of Cancer and Medicine.

In The Last Decade

Ayumi Shikama

26 papers receiving 316 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ayumi Shikama Japan 11 146 102 90 73 65 33 318
Kevin L. Hall United States 10 165 1.1× 127 1.2× 61 0.7× 40 0.5× 34 0.5× 16 325
Yusuke Matsuura Japan 12 204 1.4× 203 2.0× 55 0.6× 26 0.4× 18 0.3× 42 403
Akira Yabuno Japan 11 126 0.9× 123 1.2× 79 0.9× 67 0.9× 31 0.5× 37 322
Gordon O. Downey United States 9 249 1.7× 159 1.6× 65 0.7× 25 0.3× 46 0.7× 17 350
Madeline Mason United States 3 143 1.0× 205 2.0× 30 0.3× 24 0.3× 28 0.4× 8 287
H.W.H.M. van der Putten Netherlands 11 228 1.6× 166 1.6× 101 1.1× 48 0.7× 36 0.6× 16 406
Sambor Sawicki Poland 12 188 1.3× 91 0.9× 55 0.6× 47 0.6× 14 0.2× 44 393
Eman Abdulfatah United States 10 150 1.0× 117 1.1× 45 0.5× 54 0.7× 32 0.5× 31 306
Giulia Scaglione Italy 10 268 1.8× 214 2.1× 106 1.2× 76 1.0× 51 0.8× 58 434
Seon Kyung Lee South Korea 11 106 0.7× 83 0.8× 63 0.7× 47 0.6× 28 0.4× 31 314

Countries citing papers authored by Ayumi Shikama

Since Specialization
Citations

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

Fields of papers citing papers by Ayumi Shikama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ayumi Shikama

This figure shows the co-authorship network connecting the top 25 collaborators of Ayumi Shikama. A scholar is included among the top collaborators of Ayumi Shikama 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 Ayumi Shikama. Ayumi Shikama 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.
Saida, Tsukasa, et al.. (2025). Comprehensive analysis of calcification frequency and patterns in ovarian tumours using non-contrast CT. Japanese Journal of Radiology. 43(7). 1153–1165.
2.
Saida, Tsukasa, Miki Yoshida, Ryosuke Nemoto, et al.. (2025). Multi–b-value diffusion-weighted imaging–derived parameters for differentiating high-grade serous ovarian carcinoma from other epithelial ovarian cancers. Japanese Journal of Radiology. 43(10). 1678–1687.
3.
4.
Saida, Tsukasa, et al.. (2024). Artificial Intelligence in Obstetric and Gynecological MR Imaging. Magnetic Resonance in Medical Sciences. 24(3). 354–365. 2 indexed citations
5.
Minaguchi, Takeo, Nan Qi, Ayumi Shikama, et al.. (2024). CD25+FOXP3+CD45RA− regulatory T-cell infiltration as a prognostic biomarker for endometrial carcinoma. BMC Cancer. 24(1). 1100–1100. 1 indexed citations
6.
Nagao, Shoji, Jun Tamura, Tomoyasu Kato, et al.. (2023). Neoadjuvant chemotherapy followed by interval debulking surgery for advanced epithelial ovarian cancer: GOTIC-019 study. International Journal of Clinical Oncology. 28(6). 804–815. 3 indexed citations
7.
Nishio, Shin, Ayumi Shikama, Hidekatsu Nakai, et al.. (2022). Outcomes of Pregnancies and Deliveries of Patients Who Underwent Fertility-Preserving Surgery for Early-Stage Epithelial Ovarian Cancer. Journal of Clinical Medicine. 11(18). 5346–5346. 2 indexed citations
8.
Yonemori, Kan, Mayu Yunokawa, Kimio Ushijima, et al.. (2022). Lenvatinib plus pembrolizumab in Japanese patients with endometrial cancer: Results from Study 309/KEYNOTE‐775. Cancer Science. 113(10). 3489–3497. 17 indexed citations
9.
Fukushima, Hiroko, et al.. (2022). Characteristics of Cancers in Adolescents and Young Adults Compared with Those in Adults in Their 60s: A Single-Center Experience. Oncology. 100(3). 140–147. 1 indexed citations
10.
Xu, Chenyang, Takeo Minaguchi, Nan Qi, et al.. (2022). Differential roles of the Wip1–p38–p53 DNA damage response pathway in early/advanced-stage ovarian clear cell carcinomas. World Journal of Surgical Oncology. 20(1). 139–139. 1 indexed citations
11.
Konno, Yosuke, Hiroshi Asano, Ayumi Shikama, et al.. (2021). Lymphadenectomy issues in endometrial cancer. Journal of Gynecologic Oncology. 32(2). e25–e25. 14 indexed citations
12.
Matsumoto, Harunobu, Kaei Nasu, Ayumi Shikama, et al.. (2021). Pathological processes and pretreatment cytologic diagnosis of neuroendocrine carcinoma of the endometrium: addendum report of the Kansai Clinical Oncology Group/Intergroup study in Japan. Medical Molecular Morphology. 54(3). 237–244. 1 indexed citations
13.
14.
Nakao, Sari, Takeo Minaguchi, Ayumi Shikama, et al.. (2020). Pretreatment thrombocytosis as an independent predictive factor for chemoresistance and poor survival in epithelial ovarian cancer. Journal of Ovarian Research. 13(1). 55–55. 7 indexed citations
15.
Zhang, Shuang, Takeo Minaguchi, Chenyang Xu, et al.. (2020). PD-L1 and CD4 are independent prognostic factors for overall survival in endometrial carcinomas. BMC Cancer. 20(1). 127–127. 34 indexed citations
16.
Minaguchi, Takeo, Azusa Akiyama, Shilin Liu, et al.. (2018). Prognostic significance of PIK3CA mutation in stage IIB to IVA cervical cancers treated by concurrent chemoradiotherapy with weekly cisplatin. Medicine. 97(31). e11392–e11392. 18 indexed citations
17.
Liu, Shuling, Takeo Minaguchi, Shuang Zhang, et al.. (2018). Separate analysis of human papillomavirus E6 and E7 messenger RNAs to predict cervical neoplasia progression. PLoS ONE. 13(2). e0193061–e0193061. 14 indexed citations
18.
Nakao, Sari, Yuki Kojima, Hiroko Itô, et al.. (2017). Paraneoplastic thrombocytosis as a prognostic marker in ovarian cancer. 69(2). 626.
19.
Sakurai, M, Koji Matsumoto, Masahiko Gosho, et al.. (2016). Expression of Tissue Factor in Epithelial Ovarian Carcinoma Is Involved in the Development of Venous Thromboembolism. International Journal of Gynecological Cancer. 27(1). 37–43. 28 indexed citations
20.
Nishida, Keiko, Nobutaka Tasaka, Ayumi Shikama, et al.. (2016). Possible de novo clear cell carcinoma in the contralateral ovary 9 years after fertility-sparing surgery for Stage IA clear cell ovarian carcinoma. International Cancer Conference Journal. 6(2). 50–54.

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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