Ultrasonography of imperforate anus in neonate: an approach correlated with current surgical concepts.

Neonates with an imperforate anus pose a challenge to those responsible for diagnosing and treating the congenital abnormality. Early assessment and accurate diagnosis of the type of imperforate anus are essential for determining the appropriate surgical procedure. Transperineal ultrasonography (US) can be used to identify the internal fistula and to define the type of imperforate anus. Thus, US represents an useful noninvasive imaging modality for assisting in the diagnosis and appropriate management of this disease. We will describe this imaging technique and present different types of illustrative scans of an imperforate anus.