Diffuse moderately painful swelling of the scrotum and erythema
Because the testicle and peritesticular structures were normal a testicular torsion could be excluded. Also an epididymitis and torsion of an appendix testis could be excluded. Because of the massive edematous swelling of the scrotal wall with markedly increased vascularity the findings are consistent with an idiopathic scrotal edema. This is a self-limiting acute scrotal edema and erythema that resolves without sequela. Idiopathic scrotal edema occurs mostly in children under 10 years of age. Although it is usualy unilateral bilateral cases have been reported.
References
Acute idiopathic scrotal edema in children revisited. Klin B, Lotan G, Efrati Y, Zlotkevich L, Strauss S.
J Pediatr Surg. 2002 Aug;37(8):1200-2.
Acute idiopathic scrotal oedema: four cases and a short review. van Langen AM, Gal S, Hulsmann AR, De Nef JJ
Eur J Pediatr. 2001 Jul;160(7):455-6.