Characteristic facial features include: triangular-shaped face, pointed chin, frontal bossing, hypoplastic midface, fleshy, upturned nose, prominent mouth and lips.
[orpha.net]
All have long triangular faces with pointed chins, but other features may be present such as thick lips, large ears, fleshy upturned nose, or prominent mouth.
[wiki.ggc.edu]
upturned nose, long philtrum, full lips, and pointed, prominent chin.
[ijponline.biomedcentral.com]