Hypoglossia-hypodactyly

Hanhart syndrome (also known as Aglossia adactylia; Hypoglossia-hypodactylia syndrome; Peromelia with micrognathia) is a congenital disorder that causes an undeveloped tongue and malformed extremities and fingers. Notable cases Nick Santonastasso, actor, Instagram star, and YouTube prankster, who has no legs and only one arm. [Source: Wikipedia ]