What is the last sinus to develop in children?

The frontal sinus is indeed the last sinus to develop in children. It typically begins to develop around the age of 2 years but does not reach full adult size until adolescence, usually around the ages of 12 to 14. This delayed development can be attributed to the growth patterns of the skull, where the frontal sinus expands as the face matures and the bones around the sinus grow.

In contrast, the ethmoid and maxillary sinuses are present at birth and grow significantly during the early years of life. The sphenoid sinus usually develops between the ages of 2 to 3 years, which is earlier than the frontal sinus. Understanding the sequence and timing of sinus development is important in recognizing and diagnosing sinus-related issues in pediatric patients.