Acute Scrotal Pain Diagnosis and Management

Common Causes of Testicular Pain

The American College of Radiology recommends considering epididymitis/epididymoorchitis, testicular torsion, and torsion of testicular appendage as the most common causes of acute testicular pain, accounting for approximately 85-90% of cases 1
Epididymitis/epididymoorchitis is the most common cause in adolescents and adults, characterized by a more gradual onset, pain relief when the testicle is elevated (positive Prehn sign), and increased blood flow on ultrasound 1, 2
Testicular torsion is a surgical emergency with a bimodal distribution, requiring treatment within 6-8 hours to prevent testicular loss, characterized by sudden onset of severe pain and negative Prehn sign 1, 3
Torsion of testicular appendage is the most common cause in prepubertal boys, may present with a "blue dot sign" (visible through skin in 21% of cases) 1, 4

Ultrasound with Doppler is the first-line imaging for acute scrotal pain, can differentiate between various causes 2, 5
Advanced ultrasound techniques, such as contrast-enhanced ultrasound, microvascular imaging, and shear wave elastography, may help in difficult cases 1
MRI may be useful when ultrasound is inconclusive, particularly for testicular torsion diagnosis 5

Time-critical diagnosis of testicular torsion requires surgical intervention within 6-8 hours to prevent permanent damage 1, 3
Clinical presentations of the three most common causes can overlap, making accurate diagnosis challenging 1
Age considerations are important, as epididymitis is most common in adults, torsion of testicular appendage in prepubertal boys, and testicular torsion has a bimodal distribution 1, 4

The trauma history can be a red herring, as progressive worsening pain with systemic symptoms and a firm, tender testicle suggest torsion rather than simple traumatic injury, according to the American Urological Association, in patients with suspected testicular torsion 6
Delaying surgical consultation for imaging when clinical suspicion is high risks testicular loss, as stated by the American College of Surgeons, emphasizing the importance of prompt intervention in cases of suspected testicular torsion 6

The clinical picture of acute onset, severe pain, and firm testicle points to torsion, not infection, and starting antibiotics would delay the correct diagnosis and treatment, as recommended by the Infectious Diseases Society of America, in cases where testicular torsion is suspected 6
Hyperbaric oxygen has no established role in testicular torsion management and would represent an inappropriate and dangerous delay, according to the Undersea and Hyperbaric Medical Society, in the management of testicular torsion 6