| umls-concept:C0003466 | skos:definition | MSH: A congenital abnormality characterized by the persistence of the anal membrane, resulting in a thin membrane covering the normal ANAL CANAL. Imperforation is not always complete and is treated by surgery in infancy. This defect is often associated with NEURAL TUBE DEFECTS; MENTAL RETARDATION; and DOWN SYNDROME.,NCI: A congenital birth defect characterized by the absence of a normal anal opening. It may be associated with other congenital abnormalities. | lld:umls |
