Sonography of normal cranial sutures

Area of Science:

• Pediatric Radiology
• Neuroimaging
• Craniofacial Anatomy

Background:

• Cranial sutures are critical for brain growth and development in neonates and infants.
• Accurate sonographic assessment of these sutures is essential for diagnosing conditions like synostosis and diastasis.

Purpose of the Study:

• To establish normative sonographic measurements for major cranial sutures (sagittal, coronal, lambdoid) in neonates and infants.
• To describe the typical sonographic appearance of these sutures.

Main Methods:

• High-resolution sonography was performed on 50 neonates and infants (0-5 months corrected age) with normal cranial development.
• Sonograms were correlated with histologic sections from autopsy specimens.
• Measurements of suture width and thickness were analyzed for interobserver variability and correlation with age.

Main Results:

• Sonography revealed sutures as hypoechoic gaps between hyperechoic bony plates.
• Mean suture widths were: coronal (0.89 mm), sagittal (0.93 mm), and lambdoid (0.96 mm).
• Mean suture thicknesses were: coronal (1.97 mm), sagittal (1.88 mm), and lambdoid (2.49 mm).
• No significant correlation was found between suture measurements and patient age.

Conclusions:

• High-resolution sonography is a reliable, inexpensive method for defining cranial sutures in infants.
• The established normative data are valuable for identifying abnormal sutures, including synostotic and diastatic types.
• Suture width and thickness measurements did not vary with age in the studied population.