Acute idiopathic scrotal edema: A rare cause of scrotal erythema

Abstract The acute idiopathic scrotal edema (AISE) is a self-limited condition of uncertain etiology, characterized by an inflammatory scrotal sac thickening without expansion to the underlying layers of the scrotal wall or to the endoscrotal structures. We describe a case of a 9-year-old boy with no previous relevant medical or surgical history who presented with left acute scrotal edema and erythema extending to the ipsilateral inguinal region, perineum, buttock and upper thigh. Laboratory results were normal and the ultrasound showed thickening and edema of the left scrotal layers with a color-Doppler sign revealing intense hypervascularity of the peritesticular scrotal soft tissue with a normal testis and epididymis. Remission of symptoms occurred 60 h after presentation. This case highlights the importance of recognizing this rare condition that has characteristic clinical and ultrasonographic features. A correct diagnosis can avoid unnecessary surgical exploration of the scrotum.