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  • Zachary W A Klaassen
2019

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

12 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

Epidemiology and treatment modalities for the management of benign prostatic hyperplasia

Lokeshwar, S. D., Harper, B. T., Webb, E., Jordan, A., Dykes, T. A., Neal, D. E., Terris, M. K. & Klaassen, Z., 2019, In : Translational Andrology and Urology. 8, 5, p. 529-539 11 p.

Research output: Contribution to journalReview article

10 Scopus citations

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 journalArticle

Open Access
13 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

5 Scopus citations

How Are Patients With Prostate Cancer Managing Androgen Deprivation Therapy Side Effects?

Tella, D. & Klaassen, Z., Dec 2019, In : Clinical Genitourinary Cancer. 17, 6, p. 480-481 2 p.

Research output: Contribution to journalLetter

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

2 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

3 Scopus citations

Local therapy in patients with metastatic prostate cancer: A new standard of care?

Harper, B., Klaassen, Z. & Wallis, C. J. D., Dec 1 2019, In : Translational Cancer Research. 8, p. S592-S594

Research output: Contribution to journalComment/debate

Open Access

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

2 Scopus citations

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

Klaassen, Z., Lokeshwar, S. D., Allison, A. E. & 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

3 Scopus citations

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 2019, In : European Urology Oncology. 2, 4, p. 443-447 5 p.

Research output: Contribution to journalArticle

13 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
4 Scopus citations

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

9 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

11 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

2 Scopus citations

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

2 Scopus citations

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

5 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

11 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

10 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

13 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

4 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

45 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

21 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

5 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

27 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

10 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

21 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

2 Scopus citations

STAMPEDE-ing towards androgen biosynthesis inhibition for treatment of high-risk hormone-naïve prostate cancer: changing the LATITUDE

Klaassen, Z. & Murphy, D. G., Jan 2018, In : BJU International. 121, 1, p. 9-11 3 p.

Research output: Contribution to journalComment/debate

2 Scopus citations

Testosterone Responders to Continuous Androgen Deprivation Therapy Show Considerable Variations in Testosterone Levels on Followup: Implications for Clinical Practice

Sayyid, R. K., Sayyid, A. K., Klaassen, Z., Fadaak, K., Goldberg, H., Chandrasekar, T., Ahmad, A., Leao, R., Perlis, N., Chadwick, K., Hamilton, R. J., Kulkarni, G. S., Finelli, A., Zlotta, A. R. & Fleshner, N. E., Jan 2018, In : Journal of Urology. 199, 1, p. 251-256 6 p.

Research output: Contribution to journalArticle

The association between physician trust and prostate-specific antigen screening: Implications for shared decision-making

Klaassen, Z., Wallis, C. J. D., Goldberg, H., Chandrasekar, T., Fleshner, N. E., Finelli, A., Kulkarni, G. S., Detsky, A. S. & Satkunasivam, R., Dec 2018, In : Canadian Urological Association Journal. 12, 12, p. 395-400 6 p.

Research output: Contribution to journalArticle

Treatment Strategy for Newly Diagnosed T1 High-grade Bladder Urothelial Carcinoma: New Insights and Updated Recommendations [Figure presented]

Klaassen, Z. W. A., Kamat, A. M., Kassouf, W., Gontero, P., Villavicencio, H., Bellmunt, J., van Rhijn, B. W. G., Hartmann, A., Catto, J. W. F. & Kulkarni, G. S., Nov 2018, In : European urology. 74, 5, p. 597-608 12 p.

Research output: Contribution to journalArticle

18 Scopus citations

Two Cases of Arterioureteral Fistula in the Setting of Previous Radiation Therapy and Indwelling Ureteral Stents: Results of Endovascular Management

Chandrasekar, T., Pugashetti, N., Klaassen, Z., Goldberg, H., Dong, P. & Yap, S. A., Oct 2018, In : Clinical Genitourinary Cancer. 16, 5, p. e979-e983

Research output: Contribution to journalArticle