1
Triage examination
The case begins
A 16-year-old has sudden severe unilateral scrotal pain with nausea.
High-riding transverse testis, swelling and absent cremasteric reflex.
Which of the following is the most appropriate next step?
2
Decision support
New information
Select Reveal results to continue.
TWIST components total 7 points.
Which of the following is the most appropriate next step?
3
While awaiting transfer
New information
Select Reveal results to continue.
Pain persists; the receiving OR is ready.
Which of the following is the most appropriate next step?
Must not miss
Critical actions
Calculator / interpretation
Enter values and calculate.
Interpretation rule
Use the result as decision support. Reconcile it with physiology, trajectory, local protocol and specialist input.
Error prevention
Common mistakes—and how to mitigate them
Waiting for ultrasound
Mitigation: When suspicion is high, activate urology first.
False reassurance after pain improves
Mitigation: Intermittent torsion can detorse; history still matters.
Incomplete examination
Mitigation: Examine abdomen, groin and both testes; document lie and reflex.
Recap
What the learner should carry forward
- High clinical suspicion requires surgical action; imaging must not create harmful delay.
- A score supports—but never replaces—clinical judgment and urgent consultation.
- Manual detorsion can be a bridge in selected circumstances, never definitive treatment.
Final score interpretation: 80–100 = strong; 50–79 = review missed decisions; below 50 = repeat the case.
Evidence-based sources
Links verified September 21, 2026.
Clinical boundary
Educational content only. Apply current local protocols, patient-specific factors, consultant guidance and clinical judgment.