Objective To compare growth trends among infants with Pierre Robin sequence (PRS) to normal World Health Organization (WHO) growth standards. Study Design Case series with chart review. Subjects and Methods Twenty-four infants with syndromic and nonsyndromic PRS (54% male) treated at an urban academic medical center between 2009 and 2017 were included. Infants with symptomatic hypoventilation underwent mandibular distraction osteogenesis (71%). Weights were recorded at roughly 1- to 3-month intervals from birth to 12 months, with ages adjusted for prematurity. The 50th percentile (P50) for this cohort was calculated and compared to WHO standards. Results In total, 135 weight entries for 24 subjects were included. The birth weight P50 was similar to the WHO standard (females: 0.09 kg above WHO [95% CI, –0.25 to +0.43; z score = 0.19]; males: 0.38 kg below WHO [95% CI, –0.77 to 0.00; z score = −0.79]). A slower growth rate was noted among female and male infants with PRS: in month 5, the PRS P50 among females was 1.42 kg below the WHO standard (95% CI, –1.77 to −1.07; z score = −1.64). Among males in month 3, the PRS P50 was 1.68 kg below the WHO standard (95% CI, –2.12 to −1.24; z score = −2.19). By month 12, weight deficiencies had resolved in both groups. Conclusion Newborns with and without PRS may have similar birth weights, but the growth rate among male and female infants with PRS may lag behind that of unaffected infants, even when upper airway obstruction has been addressed in early infancy.
