In Mongolism, the patient has

Down’s Syndrome (Mongolism)  is a genetic disorder caused because of the presence of an additional copy of chromosome number 21 (trisomy of 21). This disorder was first described by Langdon Down (1866). The affected individual is short statured with a small round head, furrowed tongue and partially open mouth. Palm is broad with a characteristic palm crease. Physical, psychomotor and mental development is retarded.