Young Boy With Scrotal Swelling.

A healthy 4-year-old boy presented to the emergency department for sudden onset of painless scrotal redness and swelling. There was no trauma, fever, or dysuria. On examination, he had generalized scrotal swelling with thickened, warm, and erythematous scrotal skin and with absence of scrotal pain on palpation (Figure 1). The emergency physician performed a bedside ultrasound showing edematous thickening, easy compressibility of the scrotal wall, and diffuse hypervascular paratesticular scrotal soft tissues on color Doppler images (Figure 2).