Diseases of PNS
In acute sinusitis, the sinus most often involved in children is: [DNB Dec 2010]
Most common sinusitis in children is Ethmoid. Most common sinusitis in adults is Maxillary.
"Ethmoidal sinuses are well developed at birth, hence infants and children below 3 years of age are more likely to have acute ethmoiditis; but after this age, maxillary antral infections are more commonly seen."
"Ethmoid sinuses are more often involved in infants and young children."