Enlarged anterior cranial fossa and restricted posterior cranial fossa, the disproportionate growth of basicranium in Crouzon syndrome

Crouzon syndrome patients develop normal intracranial volume and potential restricted posterior cranial fossa volume with growth. This study aims to trace the segmental anterior, middle and posterior cranial fossae volume, and structural morphology in these patients, in order to help discern more fo...

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Bibliographic Details
Published in:Journal of cranio-maxillo-facial surgery 2019-09, Vol.47 (9), p.1426-1435
Main Authors: Lu, Xiaona, Forte, Antonio Jorge, Steinbacher, Derek M., Alperovich, Michael, Alonso, Nivaldo, Persing, John A.
Format: Article
Language:English
Subjects:
Anterior fossa
Cranial Fossa, Anterior
Cranial Fossa, Middle
Cranial Fossa, Posterior
Craniofacial Dysostosis
Crouzon syndrome
Dentistry
Humans
Intracranial volume
Morphology
Posterior fossa
Skull Base
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Summary:Crouzon syndrome patients develop normal intracranial volume and potential restricted posterior cranial fossa volume with growth. This study aims to trace the segmental anterior, middle and posterior cranial fossae volume, and structural morphology in these patients, in order to help discern more focused and individualized surgical treatment plan. Ninety-two preoperative CT scans (Crouzon, n = 36; control, n = 56) were included, and divided into 5 age related subgroups. CT scans were measured using Mimics and 3-matics software. Overall, Crouzon syndrome patients grew to a 27% (p = 0.011) increased anterior cranial fossa volume and a 20% (p = 0.001) decreased posterior cranial fossa volume, with normal middle cranial fossa and entire intracranial volume measurement. The posterior cranial fossa of Crouzon syndrome initially developed significantly reduced volume (19%, p = 0.032), compared to normals, from 6 months of age, and remained reduced thereafter. The 7.63 mm shortening of posterior cranial fossa length contributed most to the shortened entire cranial length (9.30 mm, p = 0.046). Although the entire cranial volume of Crouzon syndrome is normal overall, the segmental anterior, middle and posterior cranial fossae developed disproportionately. The early significant and lifelong restricted posterior cranial fossa addresses the importance of early posterior cranial expansion. Ideally expansion would have vectors in all three dimensions.
ISSN:1010-5182
1878-4119
DOI:10.1016/j.jcms.2019.06.003