Abnormal cranial suture/fontanelle morphology Delayed cranial suture closure Infants normally have two fontanels at birth, the diamond-shaped anterior fontanelle at the junction of the coronal and sagittal sutures, and the posterior fontanelle at the intersection of the occipital and parietal bones. The posterior fontanelle usually closes by the 8th week of life, and the anterior fontanel closes by the 18th month of life on average. This term applies if there is delay of closure of the fontanelles beyond the normal age. Delayed closure of fontanel Late-closing fontanelle Late closing fontanelles Broad late closing cranial sutures HP:0002704 UMLS:C0277828 Delayed fontanelle closure Delayed closure of fontanels Delayed closure of fontanelles Delayed closure of the fontanelles Open sutures Delayed fontanel closure SNOMEDCT_US:82779003 HP:0000270 Late closure of fontanelle Delayed cranial suture closure HP:0003794