Large fontanelles abnormal fontanelle morphology large fontanelles 2017-11-13T11:10:14Z enlarged fontanelles MPheno.ontology persistent wide fontanel large fontanelle MP:0030388 large fontanel wide fontanelles large fontanels enlarged fontanels large open fontanelles wide open fontanelles widened fontanelles an abnormally increased size of one or more fontanelles for age-related norms, generally resulting from delayed or incomplete fontanelle closure enlarged fontanelle increased size of the fontanelle