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5 Possible Causes for Anterior Fontanelle Open in Adults

  • Pyknodysostosis

    Pyknodysostosis (OMIM 265800) is a rare, autosomal recessive sclerosing skeletal dysplasia as a consequence of the diminished capacity of osteoclasts to degrade organic bone matrix. Pyknodysostosis is caused by mutation in the cathepsin K (CTSK) gene. Up to date, 34 different CTSK mutations have been identified[…][ncbi.nlm.nih.gov]

  • Cleidocranial Dysplasia

    Cleidocranial dysplasia (CCD) is a rare congenital disorder characterized by skeletal and dental anomalies. This clinical report describes the prosthodontic approach to treating a CCD patient who presented with decreased facial height and relative mandibular protrusion due to maxillary hypoplasia after orthodontic[…][ncbi.nlm.nih.gov]

  • Congenital Communicating Hydrocephalus

    fontanelle when it is still open) Findings: enlarged lateral ventricles MRI (preferred for children) or CT Indication: older infants (when fontanelle is already closed, typically[amboss.com] 6 months of age) or adults Features of acute hydrocephalus: enlarged ventricles Temporal horn dilation 2 mm Evans ratio 30% Sulcal enlargement Mickey Mouse ventricles Upward[amboss.com] Changes in vital signs resulting from brainstem compression Ultrasonography Indication: clinical suspicion during antenatal period or in infants 6 months of age (through the anterior[amboss.com]

  • Communicating Hydrocephalus

    fontanelle when it is still open) Findings: enlarged lateral ventricles MRI (preferred for children) or CT Indication: older infants (when fontanelle is already closed, typically[amboss.com] 6 months of age) or adults Features of acute hydrocephalus: enlarged ventricles Temporal horn dilation 2 mm Evans ratio 30% Sulcal enlargement Mickey Mouse ventricles Upward[amboss.com] Changes in vital signs resulting from brainstem compression Ultrasonography Indication: clinical suspicion during antenatal period or in infants 6 months of age (through the anterior[amboss.com]

  • Endemic Cretinism

    Furthermore, adult African (Uele) ME cretins ( Melot et al . 1962 ) have open anterior fontanelles, also evident in DC, HC and possibly replicated in the damaged LB1.[rspb.royalsocietypublishing.org]

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