The outcomes of conservative management and the natural history of asymptomatic hydroceles in children.

To elucidate the natural history of asymptomatic hydroceles (AHs) in children with conservative management and to discuss management strategies for AHs in children. We retrospectively reviewed 113 children with AHs who were followed without immediate surgery. Patients were divided into four groups according to age at presentation; group 1: ≤ 1 month, group 2: 1-12 months, group 3: 12-24 months, and group 4: > 24 months. Ages at spontaneous resolution or surgery were reviewed. To assess the effect of AH on the testis, testicular size before and after conservative management was compared in 11 cases. In groups 1, 2, 3, and 4, spontaneous resolution occurred in 94.3%, 75.0%, 65.0%, and 33.3%, and the average time to resolution from presentation was 5, 5, 17, and 9 months, respectively. 41 patients underwent surgery at a mean age of 4.2 years. The testicular size did not differ significantly between before and after conservative management (14.4 vs. 14.5 mm, p = 0.483). About one-third of children over 2 years of age achieve spontaneous resolution. Hydroceles with conservative management may not affect the testicular size. Thus, initial conservative management before surgery is recommend for AHs in children, even over 2 years of age.