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Emergency and Acute Medicine - Testicular Torsion
Testicular torsion is a urologic emergency caused by rotation of the testicle around the spermatic cord, leading to vascular compromise and potential infarction. The degree of torsion can vary from partial rotation to complete twisting, and ischemic damage can occur rapidly. Testicular viability is highly time dependent, with salvage rates approaching 100% if treated within 6 hours, decreasing significantly after 12 hours, and becoming very low beyond that timeframe. Despite this, attempts at salvage are still recommended up to 24 hours after symptom onset. Prolonged ischemia can result in testicular atrophy and impaired fertility.
The condition demonstrates a bimodal age distribution, most commonly affecting neonates and adolescents, particularly between the ages of 12 and 18. It is rare but still possible in older adults. The underlying cause is typically a congenital anatomical abnormality, most notably the “bell-clapper” deformity, in which the testicle lacks normal fixation within the scrotum and can rotate freely. This abnormality is often bilateral, placing both testicles at risk.
Patients usually present with sudden onset of severe unilateral testicular pain, often accompanied by scrotal swelling and redness. Pain may also radiate to the lower abdomen or inguinal region. Nausea and vomiting are common, and some patients report prior intermittent episodes of similar pain, suggesting intermittent torsion and spontaneous detorsion. Symptoms of urinary tract infection are typically absent.
On physical examination, the affected testicle may be high-riding and lie in a transverse orientation rather than its normal vertical position. One of the most important clinical findings is the absence of the cremasteric reflex on the affected side, which is highly sensitive for torsion. Differentiating torsion from other causes of acute scrotum, such as epididymitis, may be difficult in advanced cases due to swelling. The Prehn sign, which assesses pain relief with testicular elevation, is unreliable. Torsion of the appendix testis may present with a “blue dot” sign and is typically less severe.
Diagnosis requires rapid evaluation. While laboratory tests are nonspecific, imaging plays a key role when time allows. Color Doppler ultrasound is the preferred modality, demonstrating reduced or absent blood flow in the affected testicle, whereas inflammatory conditions like epididymitis show increased flow. However, imaging should not delay surgical intervention if clinical suspicion is high. In uncertain cases or when imaging is unavailable or inconclusive, immediate surgical exploration is warranted.
Management is time critical and centers on urgent urologic consultation and surgical intervention. Initial supportive care includes analgesia and intravenous fluids. If definitive surgical treatment is delayed, manual detorsion may be attempted by rotating the testicle laterally (the “open book” maneuver), as torsion typically occurs medially. Successful detorsion may relieve pain and restore blood flow, but surgical exploration is still required afterward to prevent recurrence.
All confirmed cases require surgical exploration and bilateral orchiopexy to secure both testicles and prevent future torsion. Patients with inconclusive imaging or persistent suspicion must also undergo exploration. Those with alternative diagnoses or normal imaging may be discharged with appropriate follow-up, but they should be educated on the risk of recurrence and instructed to return immediately if symptoms recur.
A key clinical principle is that testicular torsion must always be considered in any patient presenting with acute scrotal pain, especially adolescents. It can mimic other conditions such as appendicitis, and delays in diagnosis can result in loss of the testicle. The phrase “time is testicle” underscores the urgency of prompt recognition and management.
Testicular torsion is a urologic emergency caused by rotation of the testicle around the spermatic cord, leading to vascular compromise and potential infarction. The degree of torsion can vary from partial rotation to complete twisting, and ischemic damage can occur rapidly. Testicular viability is highly time dependent, with salvage rates approaching 100% if treated within 6 hours, decreasing significantly after 12 hours, and becoming very low beyond that timeframe. Despite this, attempts at salvage are still recommended up to 24 hours after symptom onset. Prolonged ischemia can result in testicular atrophy and impaired fertility.
The condition demonstrates a bimodal age distribution, most commonly affecting neonates and adolescents, particularly between the ages of 12 and 18. It is rare but still possible in older adults. The underlying cause is typically a congenital anatomical abnormality, most notably the “bell-clapper” deformity, in which the testicle lacks normal fixation within the scrotum and can rotate freely. This abnormality is often bilateral, placing both testicles at risk.
Patients usually present with sudden onset of severe unilateral testicular pain, often accompanied by scrotal swelling and redness. Pain may also radiate to the lower abdomen or inguinal region. Nausea and vomiting are common, and some patients report prior intermittent episodes of similar pain, suggesting intermittent torsion and spontaneous detorsion. Symptoms of urinary tract infection are typically absent.
On physical examination, the affected testicle may be high-riding and lie in a transverse orientation rather than its normal vertical position. One of the most important clinical findings is the absence of the cremasteric reflex on the affected side, which is highly sensitive for torsion. Differentiating torsion from other causes of acute scrotum, such as epididymitis, may be difficult in advanced cases due to swelling. The Prehn sign, which assesses pain relief with testicular elevation, is unreliable. Torsion of the appendix testis may present with a “blue dot” sign and is typically less severe.
Diagnosis requires rapid evaluation. While laboratory tests are nonspecific, imaging plays a key role when time allows. Color Doppler ultrasound is the preferred modality, demonstrating reduced or absent blood flow in the affected testicle, whereas inflammatory conditions like epididymitis show increased flow. However, imaging should not delay surgical intervention if clinical suspicion is high. In uncertain cases or when imaging is unavailable or inconclusive, immediate surgical exploration is warranted.
Management is time critical and centers on urgent urologic consultation and surgical intervention. Initial supportive care includes analgesia and intravenous fluids. If definitive surgical treatment is delayed, manual detorsion may be attempted by rotating the testicle laterally (the “open book” maneuver), as torsion typically occurs medially. Successful detorsion may relieve pain and restore blood flow, but surgical exploration is still required afterward to prevent recurrence.
All confirmed cases require surgical exploration and bilateral orchiopexy to secure both testicles and prevent future torsion. Patients with inconclusive imaging or persistent suspicion must also undergo exploration. Those with alternative diagnoses or normal imaging may be discharged with appropriate follow-up, but they should be educated on the risk of recurrence and instructed to return immediately if symptoms recur.
A key clinical principle is that testicular torsion must always be considered in any patient presenting with acute scrotal pain, especially adolescents. It can mimic other conditions such as appendicitis, and delays in diagnosis can result in loss of the testicle. The phrase “time is testicle” underscores the urgency of prompt recognition and management.
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