What is the imaging modality of choice for epididymitis?

What is the imaging modality of choice for epididymitis?

• A. X-Ray
• B. Ultrasound
• C. MRI
• D. CT Scan

Answer: (B)

Ultrasound of the scrotum with color Doppler is the imaging test of choice for suspected epididymitis. It allows direct visualization of the epididymis and testis and, crucially, assessment of blood flow. In epididymitis you typically see an enlarged, hypoechoic epididymis with increased Doppler signal due to inflammatory hyperemia, and you may also detect a reactive hydrocele or scrotal wall thickening. This modality is fast, noninvasive, widely available, and avoids radiation. The Doppler component is key because it helps distinguish epididymitis from testicular torsion. Torsion is a surgical emergency and shows reduced or absent intratesticular blood flow, signaling compromised testicular viability. While other imaging methods exist, X-ray is irrelevant here, and CT or MRI are not first-line due to limited utility, slower availability, or greater cost.

Ultrasound of the scrotum with color Doppler is the imaging test of choice for suspected epididymitis. It allows direct visualization of the epididymis and testis and, crucially, assessment of blood flow. In epididymitis you typically see an enlarged, hypoechoic epididymis with increased Doppler signal due to inflammatory hyperemia, and you may also detect a reactive hydrocele or scrotal wall thickening. This modality is fast, noninvasive, widely available, and avoids radiation.

The Doppler component is key because it helps distinguish epididymitis from testicular torsion. Torsion is a surgical emergency and shows reduced or absent intratesticular blood flow, signaling compromised testicular viability. While other imaging methods exist, X-ray is irrelevant here, and CT or MRI are not first-line due to limited utility, slower availability, or greater cost.