Sections View Full Chapter Figures Tables Videos Annotate 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 Your Access profile is currently affiliated with [InstitutionA] and is in the process of switching affiliations to [InstitutionB]. Please select how you would like to proceed. Keep the current affiliation with [InstitutionA] and continue with the Access profile sign in process Switch affiliation to [InstitutionB] and continue with the Access profile sign in process Get Free Access Through Your Institution Learn how to see if your library subscribes to McGraw Hill Medical products. Subscribe: Institutional or Individual Sign In Error: Incorrect UserName or Password Username Error: Please enter User Name Password Error: Please enter Password Sign in Forgot Password? Forgot Username? Sign in via OpenAthens Sign in via Shibboleth You already have access! Please proceed to your institution's subscription. Create a free profile for additional features.