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4 Possible Causes for Anterior Fontanelle Open in Adults

  • Pyknodysostosis

    Pycnodysostosis, an autosomal recessive osteochondrodysplasia characterized by osteosclerosis and short stature, maps to chromosome 1q21. Cathepsin K, a cysteine protease gene that is highly expressed in osteoclasts, localized to the pycnodysostosis region. Nonsense, missense, and stop codon mutations in the gene[…][ncbi.nlm.nih.gov]

  • Cleidocranial Dysplasia

    2009, N 4 (Vol. 75/4) p.521-527 Saraswathivilasam S. Suresh From the Ibri Regional Referral Hospital, Ibri, Sultanate of Oman Abstract: Cleidocranial dysplasia or dysostosis (CCD) is a condition characterised by failure of membranous ossification resulting in absence or pseudarthrosis of the clavicle, open fontanelles,[…][actaorthopaedica.be]

  • 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]

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