[…] syndrome, is rare congenital disorder characterized by a small mouth, immobile face and distal arthrogryposis.
[ugspace.ug.edu.gh]
In Case 1, deep-set eyes, epicanthus, blepharophimosis, right lid ptosis, strabismus, anti mongoloid slant, small mouth, mask-like face, high-arched palate, nasal speech,
[ncbi.nlm.nih.gov]
The appearance of the face is the most striking feature, the small dimension of the oral fissure giving rise to the term "whistling face" proposed by Burian (1963).
[ncbi.nlm.nih.gov]