Spontaneous reduction age for ovarian hernia in early infancy

Background Many articles recommend early surgery for ovarian hernia to avoid the risk of ovarian torsion. However, while ovarian hernia is known to undergo spontaneous reduction (SR) in early infancy, few reports have described the timing of SR. We therefore investigated the clinical features of SR for ovarian hernia in early infancy. Methods A total of 610 girls were diagnosed with inguinal hernia between 2008 and 2018. We focused on infants who had an ovarian hernia onset in the first 3 months of age. We reviewed the age retrospectively at the onset of hernia and age at SR. The data were compared statistically using the Kaplan-Meier method. Results Sixty-one infants with inguinal hernia were included in this study. Thirty-nine patients (64%) had ovarian hernia. The mean age at the onset of hernia was 44 +/- 17 days of age. Thirty cases underwent SR (77%). A Kaplan-Meier analysis showed that 75% of ovarian hernias underwent SR by 6 months of age. There were no cases of ovarian torsion. Conclusions Most cases of ovarian hernia underwent SR, so patients with ovarian hernia in early infancy might be treated by elective surgery after 6 months of age.