Disease_Mapped_To_Gene Cellosaurus Disease Terminology Motor Neuron Disease AR Gene Rare Non-Neoplastic Disorder Spinal and Bulbar Muscular Atrophy, X-linked 1 Disease or Syndrome Cellosaurus Spinal and Bulbar Muscular Atrophy SBMA C1839259 Spinal and Bulbar Muscular Atrophy, X-linked 1 Spinal and Bulbar Muscular Atrophy, X-linked 1 Kennedy Disease SMAX1 A rare, slowly progressive degenerative disorder affecting males. It is caused by mutations in the androgen receptor (AR) gene. It is characterized by bulbar and limb muscle weakness and atrophy, and gynecomastia. C85233 X-Linked Inherited Disorder