Isolated epididymal injury without associated underlying scrotal or testicular injury in the setting of blunt trauma is exceedingly rare. We present a case of an isolated epididymal injury incurred after scrotal trauma from a high velocity paintball round. Ultrasound demonstrated an enlarged, hypoechoic left epididymis with no evidence of underlying testicular injury. This case highlights the importance of obtaining imaging to evaluate for signs of testicular rupture, potentially obviating the need for surgery. It also reinforces the need for appropriate protective gear when participating in activities with potential for high velocity scrotal trauma.
Case reportA 36-year-old man presented to the emergency department with scrotal pain, swelling, and bruising to his left hemiscrotum. Three days prior, he had been shot in the scrotum with a paintball gun while attending a bachelor party. His medical history was unremarkable other than previous bilateral inguinal hernia repair. Physical examination demonstrated left scrotal swelling and tenderness. A palpable, moderate-sized hematoma was appreciated within the left hemiscrotum.Scrotal ultrasound demonstrated symmetrical and homogenous testes, with right and left testes measuring 5.0 × 2.5 × 2.7 cm and 2.9 × 2.9 × 4.6 cm, respectively. The left epididymis appeared enlarged, thickened, and heterogeneous in echotexture with an associated small hematocele (Fig. 1). These findings were consistent with an isolated epididymal hematoma with no evidence of testicular injury.Our patient was managed expectantly with analgesics, ice, and scrotal support. In follow-up 1 week later, his pain had resolved and the swelling had decreased. On physical examination, the size of his scrotal hematoma had significantly decreased.
DiscussionBlunt scrotal trauma is most often caused by athletic injury (50%), motor vehicle collision (9%-17%), or assault, and comprises less than 1% of trauma-related injuries.1,2 Possible injuries include testis rupture, avulsion, torsion, and hematoma. However, isolated epididymal injury without accompanying scrotal or testicular injury is exceptionally rare. Clinical evaluation of the painful, swollen scrotum can be difficult, especially when trying to delineate between pathology requiring surgical intervention versus conservative management. Before widespread use of ultrasound as a diagnostic adjunct, surgical exploration was the standard of care. Early surgical exploration leads to high testicular salvage rates along with reduced rates of delayed orchiectomy. 4 However, with high-resolution colour Doppler ultrasound, serious scrotal injuries requiring surgical repair, including testicular rupture and avulsion, can be ruled out with sensitivity approaching 100%.5 Appropriate selection of patients for conservative management can avoid unnecessary surgery and its associated complications. In patients with high-risk mechanisms and with unclear imaging findings, surgical exploration remains prudent.This case highlights the importance of genitourinary pr...