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The aim of this research is to use bibliometric analysis to investigate the status and patterns of the 100 most frequently cited publications regarding the cytotoxic T-lymphocyte-associated protein (CTLA-4) research for cancer. The articles published on the topic were retrieved from the core collection database of Web of Science and PubMed using the Medical Subject Heading (MeSH) of "CTLA-4" from 1986 to December 6, 2020. The selected articles were examined and the bibliometric data compiled based on the number of citations, the author's name, journal, publication year, institution, country, and co-occurrence keywords. 4,874 eligible papers were returned from the Web of Science Core Collection Database and PubMed. The citation frequency ranged from 2372 to 205, with a median of 460, and the top cited paper had 2372 citations. The journals with the most papers were Cell (n = 8, 3541 citations, Impact Factor (IF) = 41.577) and Journal of Experimental Medicine (n = 7, 2716 citations, IF = 10.790). Most of the published papers were from the United States of America (USA) (41.8%). A total of 485 institutes and 29 countries were involved in these 100 articles. There were 1192 authors and the author with the highest number of papers was the Nobel Prize winner, Professor James P. Allison (17 papers; 8700 citations). CTLA-4 blockade was the most frequent keyword (42.1%), followed by metastatic melanoma (4.26%). This work presents an important bibliographic source and can be saved as a reference for future medical health research on the function of CTLA-4 in cancer immunotherapy. [ABSTRACT FROM AUTHOR]