[The role of the anterior ethmoid in pathogenesis of paranasal sinusitis].
Maxillary and frontal sinuses communicate with nasal cavity via very narrow and complicated clefts, which are the part of anterior ethmoid. Any disease changes in this area usually cause the obstruction of ventilation and drainage of these larger sinuses. Subsequently the inflammation can develop. Therefore these narrow clefts of anterior ethmoid hold the key position for normal function and the pathophysiology of larger paranasal sinuses. Accurate diagnosis of diseased areas and reestablishing sinus ventilation and drainage via natural ostia is the base of treatment of sinusitis.