== Add Kennedy's Disease == 

 The list of polyglutamine diseases is not long, and all of them should be mentioned.  Missing are a) Spinal and bulbar muscular atrophy (SBMA), also known as Kennedy's Disease and b) dentatorubral-pallidoluysian atrophy (DRPLA).  There are five types of SCA's, namely 1,2,3 (Machado-Joseph disease),6 and 7.