Sections View Full Chapter Figures Tables Videos Full Chapter Figures Tables Videos Supplementary Content +++ Key Features ++ Usually presents in the newborn period Anal aperture may be very small and filled with a dot of meconium Occurs in about 3 of 10,000 live births, with slightly more males affected +++ Clinical Findings ++ Defecation is difficult Ribbon-like stools Blood and mucus per rectum Fecal impaction Abdominal distention +++ Diagnosis ++ May not be apparent at birth because the anus looks normal Rectal bleeding in a straining infant often leads to a rectal examination, which reveals a tight ring in the anal canal +++ Treatment ++ Dilation of the anal ring is usually curative but may have to be repeated daily for several weeks GET ACCESS TO THIS RESOURCE Sign In Username Error: Please enter User Name Password Error: Please enter Password Forgot Username? Forgot Password? Sign in via OpenAthens Sign in via Shibboleth Get Free Access Through Your Institution Contact your institution's library to ask if they subscribe to McGraw-Hill Medical Products. Access My Subscription GET ACCESS TO THIS RESOURCE Subscription Options Pay Per View Timed Access to all of AccessPediatrics 24 Hour $34.95 (USD) Buy Now 48 Hour $54.95 (USD) Buy Now Best Value AccessPediatrics Full Site: One-Year Individual Subscription $595 USD Buy Now View All Subscription Options