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Revista argentina de radiología

versión On-line ISSN 1852-9992


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.


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.


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).


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).


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.

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