Abnormal cranial suture/fontanelle morphology Premature closure of fontanelles UMLS:C0277827 SNOMEDCT_US:57219006 SNOMEDCT_US:1667003 Early closure of the fontanelles Normally, the posterior and lateral fontanelles are obliterated by about six months after birth, the anterior fontanelle closes by about the middle of the second year. This term refers to the situation in which the fontanelles close at an inappropriately early time point. Obliterated fontanelles Premature closure of the cranial sutures Early closure of the cranial sutures Premature closure of the bregma sutures HP:0005458 UMLS:C4072853 Early closure of the bregma sutures UMLS:C0010278 Premature fontanel closure