Objective. The purpose of this study was to investigate the histologic alte
rations in the upper airway in patients with obstructive sleep apnea syndro
me.
Study design. Surgical specimens were obtained during non-laser-assisted uv
ulopalatopharyngoplasty from 5 adult patients (4 male and 1 female) with po
lysomnographically confirmed obstructive sleep apnea syndrome.
Results. In all of the specimens, interstitial edema was present with mild
inflammatory reaction. Fat was not at all prominent.
Conclusions. It is confirmed histologically that there is edema present in
the upper airway in patients with obstructive sleep apnea syndrome. It is u
ncertain whether this edema is one of the causative mechanisms of the obstr
uction or a consequence of the syndrome.