C. De Felice et al., Hypoplastic or absent mandibular frenulum: A new predictive sign of infantile hypertrophic pyloric stenosis, J PEDIAT, 136(3), 2000, pp. 408-410
Among 25 patients with hypertrophic pyloric stenosis, a hypoplastic or abse
nt mandibular frenulum was noted in 92%, compared with 1.6% of 319 control
infants (P < .001). This previously unrecognized sign may prove helpful in
identifying newborns at risk of developing the disorder.