<prompt> The most common site of sinusitis in children REPEAT QUESTIONInferior meatusMiddle meatusSuperior meatusSpheno-ethmoidal recess  <response>: Acute ethmoid sinusitis Aetiology Acute ethmoiditis is often associated with infection of other sinuses. Ethmoid sinuses are more often involved in infants and young children.It opens into middle meatus. Ref: Diseases of ENT, PL Dhingra, 7th edition, of no. 216 