Geraldo Ishak

515 total citations
26 papers, 249 citations indexed

About

Geraldo Ishak is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Pathology and Forensic Medicine. According to data from OpenAlex, Geraldo Ishak has authored 26 papers receiving a total of 249 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Surgery, 8 papers in Pulmonary and Respiratory Medicine and 6 papers in Pathology and Forensic Medicine. Recurrent topics in Geraldo Ishak's work include Helicobacter pylori-related gastroenterology studies (7 papers), Genetic factors in colorectal cancer (6 papers) and Gastric Cancer Management and Outcomes (6 papers). Geraldo Ishak is often cited by papers focused on Helicobacter pylori-related gastroenterology studies (7 papers), Genetic factors in colorectal cancer (6 papers) and Gastric Cancer Management and Outcomes (6 papers). Geraldo Ishak collaborates with scholars based in Brazil, United States and Ukraine. Geraldo Ishak's co-authors include Paulo Pimentel de Assumpção, Williams Fernandes Barra, André Salim Khayat, Rommel Mário Rodríguez Burbano, Sâmia Demachki, Sidney Emanuel Batista dos Santos, Taíssa Maíra Thomaz Araújo, Emmanuel Dias‐Neto, Fabiano Cordeiro Moreira and Luiz Gonzaga Vaz Coelho and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and World Journal of Gastroenterology.

In The Last Decade

Geraldo Ishak

24 papers receiving 244 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Geraldo Ishak Brazil 9 121 87 79 37 33 26 249
Hong Jae Jo South Korea 11 122 1.0× 94 1.1× 44 0.6× 26 0.7× 91 2.8× 24 320
Leonardo Cardili Brazil 11 67 0.6× 128 1.5× 79 1.0× 23 0.6× 76 2.3× 48 264
Mariya Varbanova Germany 9 266 2.2× 107 1.2× 58 0.7× 13 0.4× 22 0.7× 12 330
Yongdong Wu China 10 132 1.1× 57 0.7× 74 0.9× 17 0.5× 43 1.3× 26 267
Hitoshi Yonezawa Japan 12 84 0.7× 166 1.9× 96 1.2× 22 0.6× 135 4.1× 24 379
Yoshiaki Nagatani Japan 9 78 0.6× 36 0.4× 46 0.6× 24 0.6× 76 2.3× 31 212
Lars Engstrand Sweden 5 285 2.4× 142 1.6× 66 0.8× 23 0.6× 63 1.9× 9 384
Evangelos Xynos Greece 8 104 0.9× 32 0.4× 55 0.7× 28 0.8× 60 1.8× 16 206
Hyo Jun Ahn South Korea 8 131 1.1× 52 0.6× 45 0.6× 10 0.3× 45 1.4× 13 277
Jaw Town Lin Taiwan 7 147 1.2× 62 0.7× 51 0.6× 15 0.4× 35 1.1× 10 245

Countries citing papers authored by Geraldo Ishak

Since Specialization
Citations

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

Fields of papers citing papers by Geraldo Ishak

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Geraldo Ishak

This figure shows the co-authorship network connecting the top 25 collaborators of Geraldo Ishak. A scholar is included among the top collaborators of Geraldo Ishak 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 Geraldo Ishak. Geraldo Ishak 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.
Araújo, Taíssa Maíra Thomaz, Samir Mansour Moraes Casseb, Sâmia Demachki, et al.. (2025). Transcriptional and microbial profile of gastric cancer patients infected with Epstein-Barr virus. Frontiers in Oncology. 15. 1530430–1530430.
2.
3.
Assumpção, Paulo Pimentel de, et al.. (2023). OLIGOMETASTASIS IN GASTRIC CANCER TREATMENT: IS THERE A PLACE FOR THE SURGEON?. ABCD Arquivos Brasileiros de Cirurgia Digestiva (São Paulo). 36. e1752–e1752. 4 indexed citations
4.
Barra, Williams Fernandes, André Salim Khayat, Sâmia Demachki, et al.. (2021). Gastric Cancer Microbiome. Pathobiology. 88(2). 156–169. 25 indexed citations
5.
Khayat, André Salim, Paulo Pimentel de Assumpção, Taíssa Maíra Thomaz Araújo, et al.. (2020). ACE2 polymorphisms as potential players in COVID-19 outcome. PLoS ONE. 15(12). e0243887–e0243887. 27 indexed citations
6.
Assumpção, Paulo Pimentel de, Williams Fernandes Barra, Geraldo Ishak, et al.. (2020). The diffuse-type gastric cancer epidemiology enigma. BMC Gastroenterology. 20(1). 223–223. 36 indexed citations
7.
Araújo, Taíssa Maíra Thomaz, André Salim Khayat, Geraldo Ishak, et al.. (2020). Hereditary gastric cancer: Three rules to reduce missed diagnoses. World Journal of Gastroenterology. 26(13). 1382–1393. 8 indexed citations
8.
Demachki, Sâmia, et al.. (2020). Hepatic metastasis in Frantz’s tumor: A case report. International Journal of Surgery Case Reports. 71. 66–69. 1 indexed citations
9.
Assumpção, Paulo Pimentel de, André Salim Khayat, Taíssa Maíra Thomaz Araújo, et al.. (2019). The Small Bowel Cancer Incidence Enigma. Pathology & Oncology Research. 26(2). 635–639. 6 indexed citations
10.
Assumpção, Paulo Pimentel de, Taíssa Maíra Thomaz Araújo, Williams Fernandes Barra, et al.. (2019). Suicide journey of H. pylori through gastric carcinogenesis: the role of non-H. pylori microbiome and potential consequences for clinical practice. European Journal of Clinical Microbiology & Infectious Diseases. 38(9). 1591–1597. 24 indexed citations
11.
Barra, Williams Fernandes, Geraldo Ishak, Sidney Emanuel Batista dos Santos, et al.. (2018). Traps and trumps from adjacent-to-tumor samples in gastric cancer research. Chinese Journal of Cancer Research. 30(5). 564–567. 4 indexed citations
12.
Barra, Williams Fernandes, Taíssa Maíra Thomaz Araújo, Danielle Queiroz Calcagno, et al.. (2017). Symptoms based cancer diagnosis–An inconceivable strategy. 1(1). 1 indexed citations
13.
Ishak, Geraldo, Marialva Tereza Ferreira de Araújo, Sâmia Demachki, et al.. (2016). Intrahepatic mRNA Expression of FAS, FASL, and FOXP3 Genes Is Associated with the Pathophysiology of Chronic HCV Infection. PLoS ONE. 11(5). e0156604–e0156604. 11 indexed citations
14.
Smith, Marı́lia de Arruda Cardoso, et al.. (2016). The Emerging Role of miRNAs and Their Clinical Implication in Biliary Tract Cancer. Gastroenterology Research and Practice. 2016. 1–10. 5 indexed citations
15.
Ishak, Geraldo, Marialva Tereza Ferreira de Araújo, Sâmia Demachki, et al.. (2015). NGF and P75NTR Gene Expression Is Associated with the Hepatic Fibrosis Stage Due to Viral and Non-Viral Causes. PLoS ONE. 10(3). e0121754–e0121754. 13 indexed citations
16.
Ishak, Geraldo, et al.. (2014). Gallbladder and Rectal Synchronous Adenocarcinoma: Case Report. Journal of Gastroenterology and Hepatology Research. 3(12). 1401–1404. 2 indexed citations
17.
Assumpção, Paulo Pimentel de, et al.. (2013). Adenocarcinoma gástrico T4b: experiência de 12 anos em Hospital Universitário. ABCD Arquivos Brasileiros de Cirurgia Digestiva (São Paulo). 26(4). 268–273. 4 indexed citations
18.
Ishak, Geraldo, et al.. (2010). Pneumoperitoneum in association with perforated appendicitis in a Brazilian Amazon woman. Case report.. PubMed. 31(3). 80–2. 3 indexed citations
19.
Assumpção, Paulo Pimentel de, Geraldo Ishak, Elizabeth Chen, et al.. (2006). Numerical aberrations of chromosome 8 detected by conventional cytogenetics and fluorescence in situ hybridization in individuals from northern Brazil with gastric adenocarcinoma. Cancer Genetics and Cytogenetics. 169(1). 45–49. 27 indexed citations
20.
Ishak, Geraldo, et al.. (1998). Histoplasmose como causa de perfuração intestinal em paciente com síndrome da imunodeficiência adquirida. Revista do Colégio Brasileiro de Cirurgiões. 25(3). 209–210.

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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