Non-Syndromic Craniosynostosis

Non - Syndromic Craniosynostosis

What is Craniosynostosis?

Craniosynostosis is a birth defect in which one or more of the sutures in a baby’s skull close too early, before the brain has fully developed. These sutures are flexible joints that allow the skull to expand as the baby’s brain grows. When they close prematurely, it can result in an abnormally shaped head and, in some cases, increased pressure on the brain.

What Causes Craniosynostosis?

Craniosynostosis can be :

Isolated (nonsyndromic) : Occurs on its own without other health issues. This is the most common type.
Syndromic : Linked to genetic syndromes such as Apert, Crouzon, or Pfeiffer syndrome. These forms often affect multiple sutures and may involve other parts of the body like hands and feet.

Risk Factors

Genetic mutations
Family history
Maternal smoking or certain medications during pregnancy
Advanced paternal age

Diagnosis

Diagnosis usually involves :

Physical examination
Measurement of head circumference and shape
Imaging tests such as :
- CT scan: Best for seeing fused sutures
- X-ray: May show early fusion
- 3D imaging: For surgical planning
Advanced paternal age

Types of Craniosynostosis

Each type is based on which suture(s) close too early :

Sagittal Synostosis (Scaphocephaly) : Most common type. Results in a long, narrow head shape.
Coronal Synostosis : One or both coronal sutures fuse early. Causes forehead flattening and asymmetry (if one-sided).
Metopic Synostosis (Trigonocephaly) : Closure of the metopic suture causes a triangular forehead.
Lambdoid Synostosis : Rare. Closure of the lambdoid suture at the back of the skull causes flattening and tilting.
Multiple Sutures Involved : Can lead to complex skull deformities and higher risk of raised intracranial pressure.

Signs and Symptoms

Abnormally shaped head
Uneven forehead or brow
Bulging or misshapen fontanelle (soft spot)
Slow or no growth of the head
Developmental delays (in severe cases)
Visible ridges where sutures have closed
Increased intracranial pressure: vomiting, irritability, sleepiness, or seizures in rare cases

Treatment depends on the Type and Severity

Surgery

The mainstay treatment for moderate to severe cases.
Goal : Allow normal brain growth, relieve pressure (if needed), and improve skull appearance.
Types of surgery:
- Open cranial vault reconstruction (traditional)
- Endoscopic surgery (less invasive, for infants under 6 months)
Surgery is ideally done between 3–12 months of age for best results.

Monitoring Only

In very mild, nonsymptomatic cases.

Helmet Therapy

In mild cases or post-surgery.
Helps mold the skull as the baby grow

Prognosis

With timely diagnosis and proper treatment, most children with craniosynostosis live healthy, normal lives. Early surgical correction usually results in excellent cosmetic and functional outcomes. Syndromic cases may require multiple surgeries and long-term care.