Sidney Roberto Nadal

774 total citations
66 papers, 459 citations indexed

About

Sidney Roberto Nadal is a scholar working on Surgery, Epidemiology and Oncology. According to data from OpenAlex, Sidney Roberto Nadal has authored 66 papers receiving a total of 459 indexed citations (citations by other indexed papers that have themselves been cited), including 45 papers in Surgery, 40 papers in Epidemiology and 16 papers in Oncology. Recurrent topics in Sidney Roberto Nadal's work include Colorectal and Anal Carcinomas (35 papers), Cervical Cancer and HPV Research (33 papers) and Viral-associated cancers and disorders (12 papers). Sidney Roberto Nadal is often cited by papers focused on Colorectal and Anal Carcinomas (35 papers), Cervical Cancer and HPV Research (33 papers) and Viral-associated cancers and disorders (12 papers). Sidney Roberto Nadal collaborates with scholars based in Brazil, France and Uganda. Sidney Roberto Nadal's co-authors include Carmen Ruth Manzione, Edenilson Eduardo Calore, Mânlio Basílio Speranzini, Marcelo Lima Ribeiro, Alessandra Gambero, Aurea Favero Ferreira, Carlos Augusto Real Martinez, José Aires Pereira, Ana L. Martínez‐López and John Verrinder Veasey and has published in prestigious journals such as SHILAP Revista de lepidopterología, Scientific Reports and Diseases of the Colon & Rectum.

In The Last Decade

Sidney Roberto Nadal

54 papers receiving 416 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Sidney Roberto Nadal Brazil 12 309 279 89 52 38 66 459
Pius Agbenorku Ghana 12 172 0.6× 116 0.4× 27 0.3× 47 0.9× 53 1.4× 44 346
Victoria Martin United States 10 128 0.4× 114 0.4× 21 0.2× 40 0.8× 24 0.6× 22 434
R J Hillman United Kingdom 10 251 0.8× 195 0.7× 26 0.3× 12 0.2× 47 1.2× 18 317
Oriana M. Damas United States 12 214 0.7× 127 0.5× 55 0.6× 61 1.2× 125 3.3× 49 514
Jaqueline Driemeyer Correia Horvath Brazil 10 130 0.4× 92 0.3× 21 0.2× 35 0.7× 17 0.4× 27 262
Antonio Macaya Spain 6 174 0.6× 41 0.1× 31 0.3× 195 3.8× 32 0.8× 12 316
V. Godding Belgium 10 142 0.5× 52 0.2× 26 0.3× 14 0.3× 57 1.5× 17 504
Jeffrey S. Sartin United States 9 141 0.5× 93 0.3× 11 0.1× 34 0.7× 35 0.9× 14 345
Evelyn Minis United States 12 179 0.6× 117 0.4× 15 0.2× 66 1.3× 16 0.4× 32 475
Carlo Penna Italy 11 229 0.7× 124 0.4× 31 0.3× 51 1.0× 71 1.9× 22 382

Countries citing papers authored by Sidney Roberto Nadal

Since Specialization
Citations

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

Fields of papers citing papers by Sidney Roberto Nadal

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sidney Roberto Nadal. 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 Sidney Roberto Nadal. The network helps show where Sidney Roberto Nadal may publish in the future.

Co-authorship network of co-authors of Sidney Roberto Nadal

This figure shows the co-authorship network connecting the top 25 collaborators of Sidney Roberto Nadal. A scholar is included among the top collaborators of Sidney Roberto Nadal 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 Sidney Roberto Nadal. Sidney Roberto Nadal 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.
Mascarenhas, Miguel, João Afonso, Joana Mota, et al.. (2025). Evaluating ChatGPT-4 for the Interpretation of Images from Several Diagnostic Techniques in Gastroenterology. Journal of Clinical Medicine. 14(2). 572–572. 2 indexed citations
2.
3.
Sobrado, Carlos Walter, et al.. (2022). Is there a higher frequency of anal dysplasia and infection by human papillomavirus in Crohn's disease patients?. Brazilian Journal of Medical and Biological Research. 55. e12141–e12141. 2 indexed citations
4.
Nadal, Sidney Roberto, et al.. (2020). Analyzing the prevalence of proctological diseases in HIV-positive and -negative patients. SHILAP Revista de lepidopterología. 40(4). 326–333.
5.
Manzione, Carmen Ruth, et al.. (2017). DIAGNÓSTICO DIFERENCIAL ENTRE CARCINOMA ESPINOCELULAR E HERPES HIPERTRÓFICO ANAL: SÉRIE DE CASOS. Journal of Coloproctology. 37. 136–136.
6.
Gamba, Mônica Antar, et al.. (2015). Giant condyloma acuminatum: report of surgical treatment and evolution of healing. 27(1-2). 48–53.
7.
Manzione, Carmen Ruth, et al.. (2010). Uso de imiquimode tópico no tratamento da infecção anal pelo papilomavírus humano. Revista Brasileira de Coloproctologia. 30(1). 92–94. 1 indexed citations
8.
Calore, Edenilson Eduardo, et al.. (2010). Prevalence of anal cytological abnormalities in women with positive cervical cytology. Diagnostic Cytopathology. 39(5). 323–327. 19 indexed citations
9.
Martínez‐López, Ana L., et al.. (2009). Sobrecarga de los cuidadores familiares de pacientes con esquizofrenia: factores determinantes. Anales del Sistema Sanitario de Navarra. 23(1). 101–110. 19 indexed citations
10.
Nadal, Sidney Roberto, et al.. (2009). Sensibilidade e especificidade da citologia anal com escova no diagnóstico das lesões clínicas provocadas pelo papilomavírus humano, comparando uma com duas coletas. Revista Brasileira de Coloproctologia. 29(3). 297–302. 5 indexed citations
11.
Nadal, Sidney Roberto, et al.. (2009). Papulose bowenóide: um aspecto clínico da infecção pelo HPV. SHILAP Revista de lepidopterología. 29(4). 505–507. 1 indexed citations
12.
Nadal, Sidney Roberto, et al.. (2009). Quanto a escova deve ser introduzida no canal anal para avaliação citológica mais eficaz?. Revista da Associação Médica Brasileira. 55(6). 749–751. 10 indexed citations
13.
Calore, Edenilson Eduardo, et al.. (2009). Anal cytology in patients with AIDS. Diagnostic Cytopathology. 38(4). 260–263. 6 indexed citations
14.
Nadal, Sidney Roberto, et al.. (2008). Comparison of Perianal Diseases in HIV-Positive Patients During Periods Before and After Protease Inhibitors Use. Diseases of the Colon & Rectum. 51(10). 1491–1494. 16 indexed citations
15.
Manzione, Carmen Ruth, et al.. (2007). Indicações e achados das colonoscopias nos doentes HIV-positivo: comparação com soronegativos. Revista Brasileira de Coloproctologia. 27(1). 26–30. 1 indexed citations
16.
Nadal, Sidney Roberto & Carmen Ruth Manzione. (2006). Papilomavirus humano e o câncer anal. Revista Brasileira de Coloproctologia. 26(2). 204–207. 5 indexed citations
17.
Manzione, Carmen Ruth, Sidney Roberto Nadal, & Edenilson Eduardo Calore. (2004). Oncogenicidade do papilomavírus humano e o grau de neoplasia intra-epitelial anal em doentes HIV positivo. Revista da Associação Médica Brasileira. 50(3). 282–285. 7 indexed citations
18.
Nadal, Sidney Roberto & Carmen Ruth Manzione. (2003). IDENTIFICAÇÃO DOS GRUPOS DE RISCO PARA AS DOENÇAS SEXUALMENTE TRANSMITIDAS. 5 indexed citations
19.
Nadal, Sidney Roberto, et al.. (1999). Management of idiopathic ulcer of the anal canal by excision in HIV-positive patients. Diseases of the Colon & Rectum. 42(12). 1598–1601. 10 indexed citations
20.
Nadal, Sidney Roberto, et al.. (1995). Hernia traumatica da parede abdominal. Revista do Colégio Brasileiro de Cirurgiões. 22(5). 296–298.

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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