<prompt> Pathognomic features of Maxillary sinusitis is:Mucopus in the middle meatusInferior turbinate hypertrophyPurulent nasal dischargeAtrophic sinusitis  <response>: Mucopus in middle meatus 182, Dhingra 4th 209-Maqbool 11th In maxillary sinusitis - pus is seen in the middle meatus particularly when the head is kept is down with infected sinus uppermost maqbool Presence of mucopus in the nose is suggestive of sinus infection and its position determines the sinus involved Most common pathological changes are the result of increased vascular permeability causing hypertrophy of the mucosa which may eventually become polypoidal. Purulent nasal discharge is the commonest complaint Occipitomental view Waters view is helpful. CT sinus is diagnostic 