Weissenbacher-Zweymuller syndrome (WZS) is characterized by short stature at birth, neonatal micrognathia, cleft palate, rhizomelic chondrodysplasia with 'dumbbell' shaped arm and leg bones, hypertelorism and vertebral coronal clefts.

Posterior displacement of the tongue into the pharynx, i.e., a tongue that is mislocalised posteriorly.