Abstract
Objective
To evaluate the trend that despite recent advances in the screening, diagnosis, and management of prostate cancer (PCa), African-Americans (AAs) continue to have poorer outcomes compared to their Caucasian (CAU) counterparts. The reason for this may be rooted in biological differences in the cancer between the two groups; however, there may be some inherent disparities within the efficacy of the screening modalities. In this study, we aim to evaluate the negative predictive value (NPV) of multi-parametric MRI (mpMRI) between AA compared to CAUs.
Methods
All mpMRI between January 2014 and June 2017 were evaluated. The MRIs were read by dedicated genitourinary radiologists. Subsequently, the readings were correlated to final pathology after the patients underwent radical prostatectomy. The NPV and negative likelihood ratios (−LR) of mpMRI were evaluated in AAs versus CAUs based on four cutoffs (≥ Grade I, ≥ Grade II, ≥ Grade III and ≥ Grade IV).
Results
The mpMRI was almost equally as effective between AAs and CAUs in excluding Grade III (NPV = 89 and 94, respectively), and Grade IV or above (NPV = 96 and 98, respectively) PCa; however, the NPV of mpMRI was significantly lower for Grade I (NPV = 32 and 52, respectively) and Grade II (NPV = 50 and 79, respectively) PCa.
Conclusion
Despite advances in the screening for PCa, there are disparities noted in the efficacy of screening tools between AAs and CAUs. For this reason, patients should be risk stratified and their screening results should be evaluated with consideration given to their baseline risk.
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Abbreviations
- AA:
-
African-American
- CAU:
-
Caucasian
- mpMRI:
-
Multi-parametric magnetic resonance imaging
- NPV:
-
Negative predictive value
- PCa:
-
Prostate cancer
- PI-RADS:
-
Prostate Imaging Reporting and Data System
- PSA:
-
Prostate-specific antigen
- csPCa:
-
Clinically significant prostate cancer
- EAU:
-
European Association of Urology
- PSAD:
-
PSA density
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Conception and design: AMKM, LP. Administrative support: CN, VG, LP. Provision of study material or patients: AM, CB. Collection and assembly of data: KM, AQ, LB, AM. Data analysis and interpretation: AM, LB, KM. Manuscript writing: all authors. Final approval of manuscript: all authors.
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Amr Mahran, MD, declares that he has no conflict of interest. Kirtishri Mishra, MD, declares that he has no conflict of interest. Laura Bukavina declares that she has no conflict of interest. Fredrick Schumacher, PhD, declares that he has no conflict of interest. Anna Quian, BS, declares that she has no conflict of interest. Christina Buzzy, PhD, declares that she has no conflict of interest. Carvell T. Nguyen, MD, PhD, declares that he has no conflict of interest. Vikas Gulani, MD, PhD, declares that he has no conflict of interest. Lee E. Ponsky, MD, declares that he has no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Due to the retrospective nature of the study, informed consent was waived per IRB review protocol.
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Mahran, A., Mishra, K., Bukavina, L. et al. Observed racial disparity in the negative predictive value of multi-parametric MRI for the diagnosis for prostate cancer. Int Urol Nephrol 51, 1343–1348 (2019). https://doi.org/10.1007/s11255-019-02158-6
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DOI: https://doi.org/10.1007/s11255-019-02158-6