Role of contrast agent in evaluation of periprostatic invasion in prostate cancer

Objective: Our study aims to demonstrate the detection of invasion by biparametric prostate MRI (bpMRI). Materials and methods:The cases whose histopathological diagnosis was prostate cancer (PCa) and whose mpMRI report was reported as PIRADS 4 and 5 were evaluated retrospectively by two radiologists with different prostate imaging experiences.The images were grouped into two data sets.Dataset-1 was bpMRI, and dataset-2 was mpMRI.Two radiologists first evaluated dataset-1 independently of each other, and 1 month later, dataset-2.They recorded whether there was an invasion and where it was seen in the patients.Then, the results were compared.Results: A total of 75 patients were included in the study.Periprostatic invasion was detected in 33 of the patients.Both the 1 st reader and the 2 nd reader image detected all the cases with invasion (100%) separately between dataset-1 and set-2.Compatibility for image dataset-1 and dataset-2 between both readers was observed to be excellent.Conclusions: There is no need to use contrast agent to evaluate periprostatic invasion and to have an idea about local staging in PCa patients.