Transient idiopathic primary penoscrotal edema

We present the case of a male born prematurely at 32 weeks gestation by cesarean section following overt symptoms of maternal preeclampsia. He developed severe penoscrotal edema anew one month from birth. No remarkable exposure or trauma was identified. This unexplained swelling remained uniform till 4 months of age, while the penile edema resolved spontaneously. A small benign hydrocele remained unchanged, since onset of the edema and continued after the edema subsided. This is the first report of persistent, but transient penoscrotal edema resolving in a 3 months course, without any apparent explanation, a possible pathogenetic mechanism was suggested.