Development of paranasal and mastoid sinuses: a computed tomographic pilot study

Area of Science:

• Pediatric Radiology
• Otolaryngology
• Medical Imaging

Background:

• Paranasal sinus and mastoid disease in children can lead to intracranial sepsis.
• Cranial computed tomography (CT) is a key imaging tool for evaluating these sinuses.
• Previous assessments of sinus development relied on plain radiographs and polytomography.

Purpose of the Study:

• To quantitatively analyze paranasal sinus and mastoid development in children using CT scans.
• To establish a baseline "pneumatization index" (PI) for normal sinus development.
• To identify potential indicators of paranasal sinus disease in pediatric patients.

Main Methods:

• A pilot study analyzed 30 CT scans from children aged 3 weeks to 13.8 years without prior ear, nose, or throat disease.
• A "pneumatization index" (PI) was calculated for ethmoid, sphenoid, and mastoid sinuses from CT images.
• Sinus development was assessed quantitatively based on the derived PI.

Main Results:

• The general order of sinus development was ethmoid > mastoid > sphenoid across all assessed ages.
• Newborns showed minimal mastoid and sphenoid aeration but substantial ethmoid aeration.
• Individual sinus development rates exhibited significant variability.
• An ethmoid sinus PI ≤ 0.714 in children over 5 years old was found to be highly suggestive of paranasal sinus disease.

Conclusions:

• The developed pneumatization index (PI) offers a quantitative method for assessing sinus development in children via CT.
• The findings provide a reference for normal sinus development and suggest a threshold for identifying potential disease in the ethmoid sinuses.
• This quantitative approach may aid in the early detection and management of pediatric paranasal sinus disease.