Dirk Zaak

4.4k total citations
108 papers, 3.1k citations indexed

About

Dirk Zaak is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Urology. According to data from OpenAlex, Dirk Zaak has authored 108 papers receiving a total of 3.1k indexed citations (citations by other indexed papers that have themselves been cited), including 88 papers in Surgery, 40 papers in Pulmonary and Respiratory Medicine and 26 papers in Urology. Recurrent topics in Dirk Zaak's work include Bladder and Urothelial Cancer Treatments (76 papers), Urinary and Genital Oncology Studies (50 papers) and Urological Disorders and Treatments (21 papers). Dirk Zaak is often cited by papers focused on Bladder and Urothelial Cancer Treatments (76 papers), Urinary and Genital Oncology Studies (50 papers) and Urological Disorders and Treatments (21 papers). Dirk Zaak collaborates with scholars based in Germany, United States and Netherlands. Dirk Zaak's co-authors include A. Hofstetter, Ruth Knuechel, Christian G. Stief, P. Schneede, Herbert Stepp, M. Kriegmair, Dominic Frimberger, Arndt Hartmann, Ferdinand Hofstaedter and Edwin Hungerhuber and has published in prestigious journals such as Cancer, Cancer Research and Clinical Cancer Research.

In The Last Decade

Dirk Zaak

101 papers receiving 2.9k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Dirk Zaak Germany 32 2.1k 1.0k 619 564 555 108 3.1k
M. Kriegmair Germany 32 2.5k 1.2× 1.8k 1.7× 436 0.7× 679 1.2× 1.3k 2.3× 72 4.0k
Gregers G. Hermann Denmark 21 1.1k 0.5× 360 0.4× 384 0.6× 448 0.8× 133 0.2× 59 2.0k
Sarel Halachmi Israel 25 759 0.4× 726 0.7× 531 0.9× 848 1.5× 136 0.2× 118 2.4k
Τοyoaki Uchida Japan 29 548 0.3× 1.3k 1.3× 433 0.7× 395 0.7× 488 0.9× 144 2.5k
C Bouffioux Belgium 17 3.2k 1.5× 585 0.6× 1.2k 1.9× 542 1.0× 126 0.2× 52 3.9k
Gregor Mikuz Austria 29 948 0.5× 1.1k 1.0× 162 0.3× 628 1.1× 128 0.2× 116 2.6k
Fadi Brimo Canada 33 1.5k 0.7× 1.4k 1.3× 362 0.6× 946 1.7× 84 0.2× 146 3.3k
M C Parkinson United Kingdom 30 1.9k 0.9× 1.4k 1.3× 248 0.4× 772 1.4× 149 0.3× 81 3.0k
Amir Sherif Sweden 28 3.5k 1.7× 752 0.7× 1.3k 2.1× 597 1.1× 63 0.1× 105 4.3k
Darrell D. Davidson United States 29 842 0.4× 736 0.7× 152 0.2× 577 1.0× 84 0.2× 82 2.5k

Countries citing papers authored by Dirk Zaak

Since Specialization
Citations

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

Fields of papers citing papers by Dirk Zaak

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Dirk Zaak

This figure shows the co-authorship network connecting the top 25 collaborators of Dirk Zaak. A scholar is included among the top collaborators of Dirk Zaak 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 Dirk Zaak. Dirk Zaak 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.
Gierth, Michael, Johannes Breyer, Florian Zeman, et al.. (2021). The HELENA study: Hexvix®-TURB vs. white-light TURB followed by intravesical adjuvant chemotherapy—a prospective randomized controlled open-label multicenter non-inferiority study. World Journal of Urology. 39(10). 3799–3805. 3 indexed citations
2.
Zaak, Dirk, et al.. (2018). Aktuelle und etablierte Diagnoseverfahren beim Harnblasenkarzinom. Der Urologe. 57(6). 657–664. 5 indexed citations
3.
Strittmatter, Frank, Alexander Büchner, Alexander Karl, et al.. (2011). Individual Learning Curve Reduces the Clinical Value of Urinary Cytology. Clinical Genitourinary Cancer. 9(1). 22–26. 12 indexed citations
4.
Zaak, Dirk, Thomas Städler, Stefan Tritschler, et al.. (2010). Photodynamic diagnosis in patients with T1G3 bladder cancer: influence on recurrence rate. World Journal of Urology. 28(4). 407–411. 9 indexed citations
5.
Mian, Christine, Guido Mazzoleni, Thomas Martini, et al.. (2010). Fluorescence In Situ Hybridisation in the Diagnosis of Upper Urinary Tract Tumours. European Urology. 58(2). 288–292. 51 indexed citations
6.
Grossman, H. Barton, Lance A. Mynderse, Arnulf Stenzl, et al.. (2009). POD-07.01: Hexaminolevulinate New Data: Results from the Recurrence Study. Urology. 74(4). S20–S21.
7.
Stenzl, Arnulf, D. Jocham, Patrice Jichlinski, et al.. (2008). Photodynamische Diagnostik im Harntrakt: Konsensusempfehlungen des Arbeitskreises Onkologie der Deutschen Gesellschaft für Urologie. Urologe A. 47(8). 982–987. 7 indexed citations
8.
Hungerhuber, Edwin, et al.. (2008). Adenocarcinoma of the bladder following nephrogenic adenoma: a case report. Journal of Medical Case Reports. 2(1). 164–164. 15 indexed citations
9.
Burger, Maximilian, Stefan Denzinger, Wolf‐Ferdinand Wieland, et al.. (2008). Does the current World Health Organization classification predict the outcome better in patients with noninvasive bladder cancer of early or regular onset?. British Journal of Urology. 102(2). 194–197. 14 indexed citations
10.
Burger, Maximilian, Dirk Zaak, Christian G. Stief, et al.. (2007). Photodynamic Diagnostics and Noninvasive Bladder Cancer: Is It Cost-Effective in Long-Term Application? A Germany-Based Cost Analysis. European Urology. 52(1). 142–147. 80 indexed citations
11.
Stoehr, Robert, C. Adam, Simone Bertz, et al.. (2006). FGFR3 mutation analysis in flat urothelial hyperplasia - strong evidence for chromosome 9 deletions as the earliest genetic alterations in the development of papillary bladder cancer. Cancer Research. 66. 81–81. 3 indexed citations
12.
Tritschler, Stefan, Dirk Zaak, Ruth Knuechel, & Christian G. Stief. (2006). Urinzytologie und Urinmarker. Der Urologe. 45(11). 1441–1448.
13.
Adam, C., Anno Graser, Walter Koch, et al.. (2006). Symphysitis following transrectal biopsy of the prostate. International Journal of Urology. 13(6). 832–833. 8 indexed citations
14.
Wild, Peter J., Alexander Herr, Christoph Wissmann, et al.. (2005). Gene Expression Profiling of Progressive Papillary Noninvasive Carcinomas of the Urinary Bladder. Clinical Cancer Research. 11(12). 4415–4429. 85 indexed citations
15.
Hartmann, Arndt, Robert Stoehr, Dirk Zaak, et al.. (2004). Early onset bladder cancers show distinct clinical, pathological and molecular features. Cancer Research. 64. 336–336. 2 indexed citations
16.
Reich, Oliver, et al.. (2004). Use of argon plasma coagulation in endourology: in vitro experiments. Urology. 63(2). 387–391. 1 indexed citations
17.
Kavoussi, Louis R., Dan Stoianovici, C. Adam, et al.. (2002). Telerobotische Chirurgie zwischen Baltimore und München. Der Urologe. 41(5). 489–492. 15 indexed citations
18.
Siebels, Michael, R. Oberneder, Alexander Büchner, et al.. (2002). Ambulante Radiochirurgie bei zerebral metastasiertem Nierenzellkarzinom Fünfjahresergebnisse von 58 Patienten. Der Urologe. 41(5). 482–488. 9 indexed citations
19.
Corvin, Stefan, et al.. (2001). Simultaneous Microsurgical Spermatic Vein Ligation and Sclerotherapy. European Urology. 40(3). 350–353.
20.
Hartmann, Arndt, Gudrun Schlake, Wolfgang Dietmaier, et al.. (2000). Clonality and Genetic Divergence in Multifocal Low-Grade Superficial Urothelial Carcinoma as Determined by Chromosome 9 and p53 Deletion Analysis. Laboratory Investigation. 80(5). 709–718. 91 indexed citations

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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