RT Book, Section
A1 Bianchi, Diana W.
A1 Crombleholme, Timothy M.
A1 D'Alton, Mary E.
A1 Malone, Fergal D.
SR Print(0)
ID 1106399297
T1 Imperforate Anus
T2 Fetology: Diagnosis and Management of the Fetal Patient, 2e
YR 2015
FD 2015
PB McGraw-Hill Education
PP New York, NY
SN 978-0-07-144201-5
LK obgyn.mhmedical.com/content.aspx?aid=1106399297
RD 2024/09/17
AB Key  PointsIncidence  is  1  in  5,000  livebirths.  Has  been  linked  to  maternal  diabetes,  thalidomide,  ethanol,  and  assisted  reproductive  technology.Imperforate  anus  is  difficult  to  diagnose  by  prenatal  sonographic  studies.Sonographic  findings  that  may  be  due  to  imperforate  anus  include  transient  bowel  dilation  in  first  trimester,  intraluminal  calcifications  in  the  colon,  and  persistent  distal  bowel  dilation  later  in  gestation.Fetal  MRI  may  be  an  important  adjunct  to  ultrasound  examination  if  anorectal  malformation  is  suspected.50%  of  anorectal  malformations  have  associated  anomalies  of  the  spine,  limbs,  genitourinary  system,  trachea,  esophagus  and  the  heart.  Echocardiogram  is  indicated.Associated  with  many  syndromes  and  chromosome  abnormalities.  Amniocentesis  is  indicated  for  fetal  karyotype.Delivery  should  occur  in  a  tertiary  care  center  with  pediatric  surgical,  radiologic,  and  genetic  expertise  available.Bowel  continence  is  usually  achieved  in  90%  of  patients.