“…5,11 The narrowness of the fauces was recognized as a significant predictor of OSAS by Tsai et al, 6 which was supported by Thulesius et al 14 Why are both the soft palate position, assessed with the MMS, and the retroglossal space good predictors of the outcome of nasal surgery for OSAS, whereas neither tonsil size nor the narrowness of the fauces is a good predictor? Anatomically, tonsil size and the narrowness of the fauces prescribe the lateral, but not the longitudinal, diameter at the level of the oropharynx.…”