Scaphocephaly – Causes, Symptoms and Treatment
Scaphocephaly is a skull deformity in which the head appears elongated and narrow due to premature fusion of the sagittal suture.
Things worth knowing about "Scaphocephaly"
Scaphocephaly is a skull deformity in which the head appears elongated and narrow due to premature fusion of the sagittal suture.
What is Scaphocephaly?
Scaphocephaly is a congenital skull deformity that belongs to the group of conditions known as craniosynostoses. It occurs when the sagittal suture – the fibrous joint running along the top of the skull from front to back – fuses prematurely, before normal skull growth is complete. Because the brain continues to grow but the skull can no longer expand sideways, it compensates by growing in length. The result is a distinctively long, narrow head shape resembling the hull of a boat – which is reflected in the name (Greek: skaphe = boat, kephalos = head).
Causes
The exact cause of scaphocephaly is not fully understood in most cases. The condition can be categorized as follows:
- Idiopathic form: The most common type, in which no specific cause is identified.
- Genetic form: Mutations in certain genes (e.g., FGFR genes) that regulate bone growth may be involved in some cases.
- Syndromic form: Scaphocephaly can occur as part of syndromes such as Crouzon syndrome or Apert syndrome.
Known risk factors include a positive family history and certain prenatal influences.
Symptoms
The most characteristic feature of scaphocephaly is the typical head shape:
- Markedly elongated skull from front to back (dolichocephaly)
- Narrowing of the skull in width
- Prominent forehead and/or protruding occiput (back of the head)
- A palpable or visible bony ridge along the sagittal suture
In mild cases, scaphocephaly may be purely cosmetic with no neurological impairment. In more severe cases, however, increased intracranial pressure may develop, potentially leading to headaches, visual disturbances, or developmental delays.
Diagnosis
Diagnosis is typically made shortly after birth or during the first months of life. The following examinations are used:
- Clinical examination: Assessment of head shape, measurement of head circumference and cephalic index.
- Skull X-ray: Detection of premature suture fusion.
- Computed tomography (CT) scan: Detailed imaging of the cranial sutures and assessment of intracranial pressure.
- Genetic testing: Recommended when a syndromic cause is suspected or there is a family history.
Treatment
Treatment of scaphocephaly depends on the severity and the age of the patient:
Surgical Treatment
Surgery is the only causal treatment option and is ideally performed during the first year of life, while skull growth is still active. Common surgical approaches include:
- Endoscopic strip craniectomy: A minimally invasive procedure in which the fused suture is removed; typically performed between 3 and 6 months of age, followed by helmet therapy.
- Open craniotomy with skull reconstruction: A more extensive procedure to reshape the entire skull vault, typically performed between 6 and 12 months of age.
- Spring-assisted cranioplasty: Another surgical variant using springs to gradually widen the skull.
Follow-up Care
After surgery, regular follow-up appointments with neurosurgeons, pediatricians, and developmental specialists are essential to monitor skull growth and neurological development.
Prognosis
With early diagnosis and timely surgical treatment, the prognosis for children with scaphocephaly is generally favorable. Most children develop neurologically within the normal range. Left untreated, there is a risk of persistently elevated intracranial pressure with potential long-term neurological consequences.
References
- Mathijssen, I. M. J. (2021). Guideline for Care of Patients With the Diagnoses of Craniosynostosis. Journal of Craniofacial Surgery, 32(1), 391–450.
- Muenke, M. & Wilkie, A. O. M. (2001). Craniosynostosis. In: Scriver et al. (eds.), The Metabolic and Molecular Bases of Inherited Disease. McGraw-Hill.
- World Health Organization (WHO): International Classification of Diseases (ICD-11), entry on craniosynostosis. WHO Press, Geneva.
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