Microgenia is the medical term for an unusually small or deformed chin. [1]
The contrasting condition, an enlarged chin, is called "macrogenia". [2] [3] [4]
There are seven different chin deformities:
Class II microgenia is the most commonly encountered chin deformity, followed by class II macrogenia. [5]
Can occur in anyone, but is often a sign of Down syndrome. [6] [7] [8]