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  • Zachary W A Klaassen
2020

Perioperative venous thromboembolism prophylaxis in prostate cancer surgery

Klaassen, Z., Wallis, C. J. D., Lavallée, L. T. & Violette, P. D., Mar 1 2020, In : World Journal of Urology. 38, 3, p. 593-600 8 p.

Research output: Contribution to journalArticle

1 Scopus citations

Twitter and academic Urology in the United States and Canada: a comprehensive assessment of the Twitterverse in 2019

Chandrasekar, T., Goldberg, H., Klaassen, Z., Wallis, C. J. D., Leong, J. Y., Liem, S., Teplitsky, S., Noorani, R. & Loeb, S., Jan 1 2020, In : BJU International. 125, 1, p. 173-181 9 p.

Research output: Contribution to journalArticle

1 Scopus citations
2019

Abiraterone Acetate for Nonmetastatic Castration-Resistant Prostate Cancer - The Forgotten Dance Partner?

Klaassen, Z., Wallis, C. J. D. & Fleshner, N. E., Feb 2019, In : JAMA Oncology. 5, 2, p. 144-145 2 p.

Research output: Contribution to journalComment/debate

1 Scopus citations

Age Differences in Patient-reported Psychological and Physical Distress Symptoms in Bladder Cancer Patients – A Cross Sectional Study

Ajaj, R., Berlin, A., Klaassen, Z., Chandrasekar, T., Wallis, C. J. D., Ahmad, A. E., Herrera Cáceres, J. O., Leao, R., Petrella, A. R., Fleshner, N., Matthew, A., Kulkarni, G. S. & Goldberg, H., Dec 2019, In : Urology. 134, p. 154-162 9 p.

Research output: Contribution to journalArticle

1 Scopus citations

Androgen deprivation therapy and gleason grade: Unravelling implications on survival

Scott, M., Klaassen, Z. & Wallis, C. J. D., Jun 1 2019, In : Translational Cancer Research. 8, 3, p. 729-731 3 p.

Research output: Contribution to journalReview article

Are there differences between de novo and secondary upper tract urothelial carcinoma tumors?

Goldberg, H., Cheung, D. C., Chandrasekar, T., Klaassen, Z., Wallis, C. J. D., Kulkarni, G. S., Sayyid, R., Evans, A., Masoomian, M., Bapat, B., Van Der Kwast, T., Hamilton, R. J., Zlotta, A. & Fleshner, N., Jan 1 2019, In : Canadian Urological Association Journal. 13, 9, p. E292-E299

Research output: Contribution to journalArticle

Open Access

Association between Smoking and Survival Benefit of Immunotherapy in Advanced Malignancies: A Systematic Review and Meta-Analysis

Wallis, C. J. D., Satkunasivam, R., Butaney, M., Khan, U. A., Goldberg, H. A., Freedland, S. J., Patel, S. P., Hamid, O., Pal, S. K. & Klaassen, Z., Sep 1 2019, In : American Journal of Clinical Oncology: Cancer Clinical Trials. 42, 9, p. 711-716 6 p.

Research output: Contribution to journalArticle

Association of Patient Sex with Efficacy of Immune Checkpoint Inhibitors and Overall Survival in Advanced Cancers: A Systematic Review and Meta-analysis

Wallis, C. J. D., Butaney, M., Satkunasivam, R., Freedland, S. J., Patel, S. P., Hamid, O., Pal, S. K. & Klaassen, Z., Apr 2019, In : JAMA Oncology. 5, 4, p. 529-536 8 p.

Research output: Contribution to journalArticle

24 Scopus citations

Cancer diagnosis and risk of suicide after accounting for prediagnosis psychiatric care: A matched-cohort study of patients with incident solid-organ malignancies

Klaassen, Z., Wallis, C. J. D., Chandrasekar, T., Goldberg, H., Sayyid, R. K., Williams, S. B., Moses, K. A., Terris, M. K., Nam, R. K., Urbach, D., Austin, P. C., Kurdyak, P. & Kulkarni, G. S., Aug 15 2019, In : Cancer. 125, 16, p. 2886-2895 10 p.

Research output: Contribution to journalArticle

6 Scopus citations

EDITORIAL COMMENT

Benton, J. Z., Lodh, A., Wallis, C. J. D. & Klaassen, Z. W. A., Oct 2019, In : Urology. 132, p. 47-48 2 p.

Research output: Contribution to journalComment/debate

Extraprostatic Extension in Core Biopsies Epitomizes High-risk but Locally Treatable Prostate Cancer

Goldberg, H., Ramiz, A. H., Glicksman, R., Salgado, N. S., Chandrasekar, T., Klaassen, Z. W. A., Wallis, C. J. D., Hosni, A., Moraes, F. Y., Ghai, S., Kulkarni, G. S., Hamilton, R. J., Perlis, N., Toi, A., Chung, P., Evans, A., van der Kwast, T., Finelli, A., Fleshner, N. & Berlin, A., Feb 2019, In : European Urology Oncology. 2, 1, p. 88-96 9 p.

Research output: Contribution to journalArticle

1 Scopus citations

First-line Treatment of Metastatic Renal Cell Carcinoma: A Systematic Review and Network Meta-analysis

Hahn, A. W., Klaassen, Z., Agarwal, N., Haaland, B., Esther, J., Ye, X. Y., Wang, X., Pal, S. K. & Wallis, C. J. D., Nov 1 2019, In : European Urology Oncology. 2, 6, p. 708-715 8 p.

Research output: Contribution to journalReview article

Open Access
3 Scopus citations

Germ Cell Testicular Tumors—Contemporary Diagnosis, Staging and Management of Localized and Advanced disease

Goldberg, H., Klaassen, Z., Chandrasekar, T., Fleshner, N., Hamilton, R. J. & Jewett, M. A. S., Mar 2019, In : Urology. 125, p. 8-19 12 p.

Research output: Contribution to journalReview article

3 Scopus citations

Immune Checkpoint Blockade plus Axitinib for Renal-Cell Carcinoma

Klaassen, Z. W. A., Satkunasivam, R. & Wallis, C. J. D., Jun 27 2019, In : New England Journal of Medicine. 380, 26, 1 p.

Research output: Contribution to journalLetter

1 Scopus citations

Lessons Learned from the Global Epidemiology of Kidney Cancer: A Refresher in Epidemiology 101

Klaassen, Z., Sayyid, R. K. & Wallis, C. J. D., Jan 2019, In : European urology. 75, 1, p. 85-87 3 p.

Research output: Contribution to journalEditorial

2 Scopus citations

Lynch Syndrome in Urologic Malignancies – What Does the Urologist Need to Know?

Goldberg, H., Wallis, C. J. D., Klaassen, Z., Chandrasekar, T., Fleshner, N. & Zlotta, A. R., Dec 2019, In : Urology. 134, p. 24-31 8 p.

Research output: Contribution to journalArticle

1 Scopus citations

Mental Illness and Bladder Cancer Patients: The Time for Assertive Intervention Is Now

Klaassen, Z., Lokeshwar, S. D., Lowery-Allison, A. & Wallis, C. J. D., Jan 1 2019, In : European Urology Focus.

Research output: Contribution to journalEditorial

1 Scopus citations

Population-based outcomes of men with a single negative prostate biopsy: Importance of continued follow-up among older patients

Sayyid, R. K., Alibhai, S. M. H., Sutradhar, R., Eberg, M., Fung, K., Klaassen, Z., Goldberg, H., Perlis, N., Madi, R., Terris, M. K., Urbach, D. R. & Fleshner, N. E., May 2019, In : Urologic Oncology: Seminars and Original Investigations. 37, 5, p. 298.e19-298.e27

Research output: Contribution to journalArticle

Re: Comparison of Population-based Observational Studies with Randomized Trials in Oncology

Wallis, C. J. D. & Klaassen, Z., Dec 2019, In : European urology. 76, 6, p. 869-870 2 p.

Research output: Contribution to journalComment/debate

1 Scopus citations

Re: Prostate Cancer-specific Mortality Across Gleason Scores in Black vs Nonblack Men

Wallis, C. J. D., Klotz, L. & Klaassen, Z. W. A., Jun 1 2019, In : European urology. 75, 6, p. 1036-1037 2 p.

Research output: Contribution to journalComment/debate

Reply to Comment on: “The impact of psychiatric utilisation prior to cancer diagnosis on survival of solid organ malignancies’’

Klaassen, Z., Wallis, C. J. D., Kurdyak, P. & Kulkarni, G. S., Jul 16 2019, In : British Journal of Cancer. 121, 2, p. 195-196 2 p.

Research output: Contribution to journalLetter

Robot-assisted Radical Cystectomy Versus Open Radical Cystectomy: A Meta-analysis of Oncologic, Perioperative, and Complication-related outcomes

Satkunasivam, R., Tallman, C. T., Taylor, J. M., Miles, B. J., Klaassen, Z. & Wallis, C. J. D., Jul 1 2019, In : European Urology Oncology. 2, 4, p. 443-447 5 p.

Research output: Contribution to journalArticle

7 Scopus citations

Systematic review and meta-analysis on trimodal therapy versus radical cystectomy for muscle-invasive bladder cancer: Does the current quality of evidence justify definitive conclusions?

Wettstein, M. S., Rooprai, J. K., Pazhepurackel, C., Wallis, C. J. D., Klaassen, Z., Uleryk, E. M., Hermanns, T., Fleshner, N. E., Zlotta, A. R. & Kulkarni, G. S., Apr 2019, In : PloS one. 14, 4, e0216255.

Research output: Contribution to journalReview article

Open Access

Systematic Review of Factors Associated with the Utilization of Radical Cystectomy for Bladder Cancer

Williams, S. B., Hudgins, H. K., Ray-Zack, M. D., Chamie, K., Smaldone, M. C., Boorjian, S. A., Daneshmand, S., Black, P. C., Kamat, A. M., Goebell, P. J., Seiler, R., Schmitz-Drager, B., Nawroth, R., Baillargeon, J., Klaassen, Z. W. A., Kulkarni, G. S., Kim, S. P., Lee, E. K., Holzbeierlein, J. M., Hollenbeck, B. K. & 1 others, Gore, J. L., Mar 2019, In : European Urology Oncology. 2, 2, p. 119-125 7 p.

Research output: Contribution to journalArticle

6 Scopus citations

The impact of psychiatric utilisation prior to cancer diagnosis on survival of solid organ malignancies

Klaassen, Z., Wallis, C. J. D., Goldberg, H., Chandrasekar, T., Sayyid, R. K., Williams, S. B., Moses, K. A., Terris, M. K., Nam, R. K., Urbach, D., Austin, P. C., Kurdyak, P. & Kulkarni, G. S., Apr 16 2019, In : British Journal of Cancer. 120, 8, p. 840-847 8 p.

Research output: Contribution to journalArticle

5 Scopus citations

The Role of Robotic Retroperitoneal Lymph Node Dissection for Testis Cancer

Klaassen, Z. W. A. & Hamilton, R. J., Aug 1 2019, In : Urologic Clinics of North America. 46, 3, p. 409-417 9 p.

Research output: Contribution to journalReview article

The who, when, and why of primary adrenal malignancies: Insights into the epidemiology of a rare clinical entity

Chandrasekar, T., Goldberg, H., Klaassen, Z., Wallis, C. J. D., Woon, D. T. S., Herrera-Caceres, J. O., Kulkarni, G. S. & Fleshner, N. E., Apr 1 2019, In : Cancer. 125, 7, p. 1050-1059 10 p.

Research output: Contribution to journalArticle

Variation and Trends in Antidepressant Prescribing for Men Undergoing Treatment for Nonmetastatic Prostate Cancer: A Population-based Cohort Study

Matta, R., Wallis, C. J. D., Goldenberg, M. G., Hird, A. E., Klaassen, Z., Kulkarni, G., Kodama, R. T., Herschorn, S. & Nam, R. K., Jan 2019, In : European urology. 75, 1, p. 3-7 5 p.

Research output: Contribution to journalArticle

3 Scopus citations
2018

Advanced Androgen Blockage in Nonmetastatic Castration-resistant Prostate Cancer: An Indirect Comparison of Apalutamide and Enzalutamide

Wallis, C. J. D., Chandrasekar, T., Goldberg, H., Klotz, L., Fleshner, N., Satkunasivam, R. & Klaassen, Z. W. A., Aug 1 2018, In : European Urology Oncology. 1, 3, p. 238-241 4 p.

Research output: Contribution to journalArticle

6 Scopus citations

Analysis of Suicide Risk in Patients with Penile Cancer and Review of the Literature

Simpson, W. G., Klaassen, Z. W. A., Jen, R. P., Hughes, W. M., Neal, D. E. & Terris, M. K., Apr 1 2018, In : Clinical Genitourinary Cancer. 16, 2, p. e257-e261

Research output: Contribution to journalReview article

8 Scopus citations

Case ‒ Foamy, high-grade prostatic intraepithelial neoplasia: A false positive for prostate cancer on multiparametric magnetic resonance imaging?

Chandrasekar, T., Goldberg, H., Klaassen, Z., Perlis, N., Finelli, A., Evans, A. & Ghai, S., May 2018, In : Canadian Urological Association Journal. 12, 5, p. E256-E259

Research output: Contribution to journalArticle

Changing Trends for Suicidal Death in Patients With Bladder Cancer: A 40+ Year Population-level Analysis

Klaassen, Z., Goldberg, H., Chandrasekar, T., Arora, K., Sayyid, R. K., Hamilton, R. J., Fleshner, N. E., Williams, S. B., Wallis, C. J. D. & Kulkarni, G. S., Jun 2018, In : Clinical Genitourinary Cancer. 16, 3, p. 206-212.e1

Research output: Contribution to journalArticle

9 Scopus citations

Characterization and outcomes of local treatment for primary bladder lymphoma: A population-based cohort analysis

Sellman, D. P., Simpson, W. G., Klaassen, Z., Jen, R. P., DiBianco, J. M., Reinstatler, L., Li, Q., Madi, R. H. & Terris, M. K., Jul 1 2018, In : Urology Annals. 10, 3, p. 249-253 5 p.

Research output: Contribution to journalArticle

2 Scopus citations

Comparison of Abiraterone Acetate and Docetaxel with Androgen Deprivation Therapy in High-risk and Metastatic Hormone-naïve Prostate Cancer: A Systematic Review and Network Meta-analysis

Wallis, C. J. D., Klaassen, Z. W. A., Bhindi, B., Goldberg, H., Chandrasekar, T., Farrell, A. M., Boorjian, S. A., Kulkarni, G. S., Karnes, R. J. & Satkunasivam, R., Jun 2018, In : European urology. 73, 6, p. 834-844 11 p.

Research output: Contribution to journalReview article

38 Scopus citations

Decreasing incidence of venous thromboembolic events after radical cystectomy: Are we finally improving?

Harper, B. T., Wallis, C. J. D. & Klaassen, Z., Dec 1 2018, In : Translational Andrology and Urology. 7, p. S747-S750

Research output: Contribution to journalReview article

Decreasing suicide risk among patients with prostate cancer: Implications for depression, erectile dysfunction, and suicidal ideation screening

Klaassen, Z., Arora, K., Wilson, S. N., King, S. A., Madi, R., Neal, D. E., Kurdyak, P., Kulkarni, G. S., Lewis, R. W. & Terris, M. K., Feb 2018, In : Urologic Oncology: Seminars and Original Investigations. 36, 2, p. 60-66 7 p.

Research output: Contribution to journalReview article

16 Scopus citations

Does perioperative chemotherapy improve survival in upper tract urothelial carcinoma? A population based analysis

Goldberg, H., Klaassen, Z., Chandrasekar, T., Sayyid, R., Kulkarni, G. S., Hamilton, R. J. & Fleshner, N. E., Apr 10 2018, In : Oncotarget. 9, 27, p. 18797-18810 14 p.

Research output: Contribution to journalArticle

1 Scopus citations

Editorial Comment

Klaassen, Z., Apr 1 2018, In : Urology. 114, 1 p.

Research output: Contribution to journalComment/debate

Evaluation of an Aggressive Prostate Biopsy Strategy in Men Younger than 50 Years

Goldberg, H., Klaassen, Z., Chandrasekar, T., Wallis, C. J. D., Toi, A., Sayyid, R., Bhindi, B., Nesbitt, M., Evans, A., van der Kwast, T., Sweet, J., Perlis, N., Hamilton, R. J., Kulkarni, G. S., Finelli, A., Zlotta, A. & Fleshner, N., Nov 2018, In : Journal of Urology. 200, 5, p. 1056-1061 6 p.

Research output: Contribution to journalArticle

1 Scopus citations

Extended Venous Thromboembolism Prophylaxis after Radical Cystectomy: A Call for Adherence to Current Guidelines

Klaassen, Z., Arora, K., Goldberg, H., Chandrasekar, T., Wallis, C. J. D., Sayyid, R. K., Fleshner, N. E., Finelli, A., Kutikov, A., Violette, P. D. & Kulkarni, G. S., Apr 2018, In : Journal of Urology. 199, 4, p. 906-914 9 p.

Research output: Contribution to journalReview article

9 Scopus citations

First-line Systemic Therapy for Metastatic Renal Cell Carcinoma: A Systematic Review and Network Meta-analysis [Figure presented]

Wallis, C. J. D., Klaassen, Z., Bhindi, B., Ye, X. Y., Chandrasekar, T., Farrell, A. M., Goldberg, H., Boorjian, S. A., Leibovich, B., Kulkarni, G. S., Shah, P. S., Bjarnason, G. A., Heng, D. Y. C., Satkunasivam, R. & Finelli, A., Sep 2018, In : European urology. 74, 3, p. 309-321 13 p.

Research output: Contribution to journalReview article

20 Scopus citations

High competing risks minimize real-world utility of adjuvant targeted therapy in renal cell carcinoma: A population-based analysis

Chandrasekar, T., Klaassen, Z., Goldberg, H., Sayyid, R. K., Kulkarni, G. S. & Fleshner, N. E., Mar 30 2018, In : Oncotarget. 9, 24, p. 16731-16743 13 p.

Research output: Contribution to journalArticle

Impact of psychiatric illness on decreased survival in elderly patients with bladder cancer in the United States

Jazzar, U., Yong, S., Klaassen, Z., Huo, J., Hughes, B. D., Esparza, E., Mehta, H. B., Kim, S. P., Tyler, D. S., Freedland, S. J., Kamat, A. M., Wolf, D. V. & Williams, S. B., Aug 2018, In : Cancer. 124, 15, p. 3127-3135 9 p.

Research output: Contribution to journalArticle

7 Scopus citations

Lymphadenectomy in Gleason 7 prostate cancer: Adherence to guidelines and effect on clinical outcomes

Chandrasekar, T., Goldberg, H., Klaassen, Z. W. A., Sayyid, R. K., Hamilton, R. J., Fleshner, N. E. & Kulkarni, G. S., Jan 2018, In : Urologic Oncology: Seminars and Original Investigations. 36, 1, p. 13.e11-13.e18

Research output: Contribution to journalArticle

3 Scopus citations

Molecular characterization of renal cell carcinoma: A potential three-MicroRNA prognostic signature

Lokeshwar, S. D., Talukder, A., Yates, T. J., Hennig, M. J. P., Garcia-Roig, M., Lahorewala, S. S., Mullani, N. N., Klaassen, Z., Kava, B. R., Manoharan, M., Soloway, M. S. & Lokeshwar, V. B., Apr 2018, In : Cancer Epidemiology Biomarkers and Prevention. 27, 4, p. 464-472 9 p.

Research output: Contribution to journalEditorial

12 Scopus citations

Preventing clinical progression and need for treatment in patients on active surveillance for prostate cancer

Goldberg, H., Klaassen, Z. W. A., Chandrasekar, T. & Fleshner, N., Jan 1 2018, In : Current Opinion in Urology. 28, 1, p. 46-54 9 p.

Research output: Contribution to journalReview article

2 Scopus citations

Replacing surveillance cystoscopy with urinary biomarkers in followup of patients with non-muscle-invasive bladder cancer: Patients’ and urologic oncologists’ perspectives

Sayyid, R. K., Sayyid, A. K., Klaassen, Z. W. A., Hersey, K., Goldberg, H., Perlis, N., Ahmad, A., Leao, R., Chandrasekar, T., Fadaak, K., Madi, R. H., Terris, M. K., Finelli, A., Hamilton, R. J., Kulkarni, G. S., Zlotta, A. R. & Fleshner, N. E., May 2018, In : Canadian Urological Association Journal. 12, 5, p. E210-E218

Research output: Contribution to journalArticle

1 Scopus citations