. Author manuscript; available in PMC: 2017 Aug 1.

Published in final edited form as: Semin Fetal Neonatal Med. 2016 Mar 17;21(4):254–262. doi: 10.1016/j.siny.2016.03.001

Table 1.

Frequency of associated syndromes.^a

Syndrome	Frequency in general population	Frequency in Pierre Robin syndrome
Stickler syndrome	1:8000	1:3
Velocardiofacial syndrome	1:2000	1:9
Treacher Collins syndrome	1:25,000	1:20
Undefined		1:3

Adapted from Lioy and Sobol [4] with permission.