The Sphenoidal Sinuses: Radiographic Patterns of Normal Development and Abnormal Findings in Infants and Children

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Abstract
Developmental patterns of sphenoidal sinuses were determined from lateral radiographs of 1702 patients from newborn to 15 yr of age. Pneumatization of the conchal sinuses was seen as early as 6 mo. of age. About 90% showed sphenoidal sinus pneumatization by 4 yr of age; 100% by 10 yr of age. Extension of pneumatization into the basisphenoid may be evident after 4 yr of age, and 95% showed basisphenoidal pneumatization after age 12. An apparent lack of pneumatization of the sphenoidal sinuses in patients over 10 should stimulate investigation for sphenoidal sinus disease. Although isolated sphenoidal sinus abnormalities were rare, sphenoidal sinus involvement was common (67-75%).

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