Abstract

A Study to Determine the Magnetic Resonance Imaging Diagnostic Accuracy for Localizing Testis in Cryptorchidism Cases

Objective: The aim of our study was to evaluate the diagnostic accuracy of MRI in order to find undescended testis in clinically diagnosed cases of cryptorchidism by taking surgical findings as the gold standard. Study design: A crosssectional survey. Place and duration: In the Radiology Department of Khyber Teaching Hospital Peshawar for the one-year duration from March 2018 to March 2019. Methods: By non-probability purposive sampling technique 170 patients were enrolled. The patients were diagnosed clinically and ultrasonically (AU5 Harmonic EZAOTI and 7.5 MHZ surface linear transducer) at the Diagnostic Radiology Department. On clinical examination; the children having ambiguous genitalia and who were not appropriate for surgery or anesthesia were not included in the study. With a 1.5 Tesla MRI system, all patients MRIs were done. Results: 0 to 16 years was the patient’s age range. The patients mean age was 5.1 ± 2.3 years. According to the affected side, there were 49 (28.8%) on the right side, 93 (54.7%) on the left side, and bilateral in 28 (16.5%). Comparison of MRI results with surgical findings revealed 127 true positive cases, 3 false-positive cases, 27 false-negative cases and 13 true negative cases. In the statistical analysis of the study, the sensitivity of MRI was 82.4%, specificity was 81.2%, diagnostic accuracy was 82.3%, negative predictive value was 32.5% and the positive predictive value was 97.6% confining undescended testis in clinically detected cryptorchidism cases taking surgical findings as the gold standard. Conclusion: It has been concluded that magnetic resonance imaging (MRI) offers a promising new imaging method for the location of the undescended testis because it has better resolution, multi-channel capacity, different arrays, and is also not dangerous and safe.

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