The meta-analysis of the two studies revealed that MRA was accurate in 98.5% of the patients (1.5% incorrect diagnosis), compared with 100% accuracy for laparoscopy.
The accuracy of MRA for nonpalpable testes varied depending on their location. Accuracy was 100% for abdominal, inguinal, inguinal nubbin and scrotal locations, and 0% for abdominal vanishing location.
The percentage of patients for whom testicular nubbin tissue would be left in situ would be 0% with the MRA-removal strategy, 29.1% with the MRA-observation strategy, and 0% with laparoscopy.
The estimated risk of having testicular tissue in a nubbin was 0 to 11%.
The estimated risk of cancer occurring in an undescended testicle was 3 to 10%.
The risk of cancer in a testicular nubbin was 0 to 1.1%.
The risk of dying of cancer in patients with an uncorrected cryptorchid testis 5.9%.