EDITOR,—Kathryn Evans's comprehensive review of sinusitis considers chronic sinusitis to be an infective condition and one that should be distinguished from rhinitis.1 The distinction between rhinitis and sinusitis is an artificial one. Nasal mucosa is contiguous with sinus mucosa, and pathology of one can be expected to affect the other.2 The same aetiological classification should be considered for chronic sinusitis as for …