Performance of the TWIST Score in Patients with Testicular Torsion that Present to the Emergency Department

Abstract Objective Testicular torsion (TT) is an emergency with an incidence of 1:1,500 in patients < 18 years old. Irreversible changes in the testicular parenchyma may happen. The Testicular Workup for Ischemia and Suspected Torsion (TWIST) questionnaire evaluates signs and symptoms to determine the risk of TT and improve the time of management. The aim of the present study was to compare the intraoperative findings of patients with TT with the result of the preoperative TWIST questionnaire. Methods A cohort of 33 pediatric patients that consulted to the emergency room was evaluated. The TWIST questionnaire was applied in the first approach. Imaging studies, time to the operating room (OR) and intraoperative findings were evaluated. Theoretical and real findings were compared. Results The median age was 13 years old (interquartile range [IQR] 10–15 years old). Edema and scrotal inflammation was the most frequent finding (42.4%), followed by testicular induration (21.2%), nausea and vomiting (15.2%), and horizontal testicle and absence of cremasteric reflex (9.1%). The TWIST stratification was 3% high-risk, 18.2% intermediate-risk and 78.8% low-risk. Testicular Doppler ultrasound was performed in 93.9% of the patients: vascular congestion was found in 21.9%. A total of 30.3% of the kids were taken to surgery after 163 minutes (±116.5). Intraoperative diagnosis of TT was confirmed in the high-risk patient, in 33.3% of the intermediate-risk, and in 50% of the low-risk. The receiver operating characteristic (ROC) curve showed an accuracy of 60% (p = 0.602). Conclusions The TWIST questionnaire in the first approach allows to take the high-risk patients immediately to the OR. However, it might not be a reliable tool for diagnosis of TT in intermediate and low-risk patients.