[Diagnosis and management of Imperforated Hymen in an infant].

Introduction: Imperforated hymen is the most frequent congenital malformation of the female genital tract. Most cases are not investigated in childhood, due to an insufficient genital examination. Its diagnosis and resolution must be early and definitive to avoid subsequent complications.

Objective: A clinical case of an infant with imperforated himen is presented. To update on genital examination technique necessary to detect this pathology in the newborn and infants, and the proper treatment.

Clinical Case: 3-months-old infant that consulted due to an increase in bulging volume in the introitus area. In the physical examination, the Valsalva's maneuver was performed allowed the ex pulsion of a homogeneous pearly mass with a smooth surface, between the labia majora, suggesting imperforate hymen. The study was complemented with gynecological ultrasound, which demons trated the presence of hydrocolpos, ruling out other anomalies. A hymenotomy was performed, which allowed for the evacuation of abundant serous material, with no bad smell, and then the hymenectomy was completed by resection of the hymenal membrane. In follow-up monitoring 4 months after the intervention, a widely permeable hymen was found.

Conclusion: Neonatal care teams require training on the correct technique of external genital examination of the newborn and infant. Hymenectomy is the technique that allows definitely resolving the condition, avoiding complications.