INTRODUCTION
Prostate cancer (PCa) is the most common cancer in the male population (1). Multiparametric magnetic resonance imaging (mpMRI), one of the current imaging modalities for prostate glands, has been successful in PCa diagnosis. This non-invasive method is now frequently used in diagnosis and preoperative staging in many healthcare centers. The increased use of prostate mpMRI has led to the need for objective criteria. For this purpose, the use of ”the “Prostate Imaging Reporting and Data System (PI-RADS),” which was prepared by the American College of Radiology (ACR) and the European Society of Urogenital Radiology (ESUR), has been suggested in reports. Currently, PI-RADS v2.1 is used for this purpose.
The most important factors determining prognosis in patients with PCa are the Gleason score and stage (2). One of the factors affecting this stage is the presence of extraprostatic extension (EPE). The postoperative prognosis is worse in patients with EPE due to the increased risk of both higher positive surgical margin rates and early biochemical recurrence(3). For this reason, preoperative evaluation of the existence of EPE in the MRI examination is essential. Recently, the detection of EPE using mpMRI is based on macroscopic EPE findings. Some objective criteria are needed for the detection of EPE, especially microscopic EPE, while evaluating mpMRI(4). The aim of our study is to evaluate the interobserver agreement in terms of the presence of EPE in the prostate mpMRI obtained using a 1.5T MRI device. Moreover, it aims to assess whether there is a relationship between EPE and capsule-tumor contact length (TCL) and lesion length (LL) in light of histopathological data.