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Revista argentina de radiología
versión On-line ISSN 1852-9992
Resumen
AINESEDER, Martina; LOPEZ GROVE, Roy; PIETRANI, Marcelo Andrés y OCANTOS, Jorge Alberto. Chronic Prostatitis: Contrast Contribution in Late Phase for its Characterization in Multiparametric-Magnetic Resonance Imaging of the Prostate. Rev. argent. radiol. [online]. 2020, vol.84, n.4, pp.115-122. ISSN 1852-9992. http://dx.doi.org/10.1055/s-0040-1713088.
Objective:
The aim of this study is to demonstrate the utility of a post-contrast late sequence in multiparametric magnetic resonance imaging (RMMP) to characterize PI-RADS II lesions.
Materials and methods:
The RMMPs performed between January 2015 and December 2016 were retrospectively analyzed. The RMMP protocol was based on the recommendations of the PI-RADS version 2, and a late acquisition was added, after the dynamic post-contrast. The reports were reviewed under the version 2.1.
Results:
31 patients with PI-RADS II lesions in the peripheral zone were selected, who were in prostate specific antigen follow-up and had histological confirmation of chronic prostatitis. A late enhancement of the lesion was evidenced in all patients. According to the histopathological results, 30 had chronic prostatitis and the remaining benign tissue (fibromuscular tissue).
Discussion:
Chronic prostatitis does not show early enhancement, and presents late enhancement due to its fibrous connective tissue. In RMMP, prostatitis may mimic prostate cancer. Adding a late sequence only adds 150 seconds to the study and could help to resolve those uncertain cases categorized as PI-RADS III using traditional sequences because the late enhancement of the lesion is highly suggestive of an inflammatory process (PI-RADS II).
Conclusion:
The presence of late enhancement is a useful tool to perform an adequate diagnosis of a PI-RADS II lesion in the peripheral zone, helping to avoid an unnecessary biopsy.
Palabras clave : chronic Prostatitis; multiparametric-magnetic resonance imaging; biopsy; histology; magnetic resonance imaging.