The nasal septum is very small, and the nostrils are shaped like a half-moon, comma, or triangle. The frontal sinuses are often missing. The nostrils may be triangular if the hypoplasia is severe.

The triad of microtia, absent/hypoplastic patellae, and short stature was observed in 82% of individuals with MGS. ... narrow nose with a broad nasal bridge are distinguishable.