Role of Diffusion Weighted Imaging in Localization of Non-palpable Undescended Testes Taking Laparoscopic Finding as Gold Standard

Abstract

Objective: To ascertain the accuracy of diffusion-weighted imaging (DWI) in the localization of undescended testes.
Material & Methods: This prospective cross-sectional study was conducted in the radiology department of a tertiary care hospital from 01-06-2022 to 15-12-2023. Total of 150 patients were included in the study. Two experienced radiologists independently examined, one observing conventional MRI alone and the other observing DWI-MRI. Following that, all of the patients underwent laparoscopic examination. The data was entered into a proforma. The findings of conventional MRI alone and DWI-MRI were correlated with laparoscopic findings. A 2 x 2 table was used to calculate the sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of DWI in comparison to laparoscopy.
Results. The average age was 10.37 +/- 5.663. Conventional MRI imaging localized 50.6 % of the cases in our study, 55% of cases via DWI-MRI and 60% by laparoscopy. Sensitivity, specificity, PPV, NPV, and accuracy of conventional MRI were 72 %, 83 %, 86 %, 66 % and 76 % respectively, while for DWI-MRI was 82 %, 86 %, 93 %, 89 %, and 78 % respectively.
Conclusion: The detection of undescended testes is improved by DWI-MRI. DWI-MRI is a recommended imaging tool for improving MRI's preoperative diagnostic accuracy in localization and identification of nonpalpable undescended testes.