Fig. 2. Representative cephalograms illustrating interaction between craniofacial dimensions and tongue size for obstructive sleep apnea development. The obstructive sleep apnea patient (  A ) had equivalent size of the lower face cage (78  vs. 77 cm²) but had larger tongue cross-sectional area (41.5  vs. 35.0 cm²) compared with the non–obstructive sleep apnea subject (  B ).