This disease is endemic in Portuguese locations Póvoa de Varzim and Vila do Conde (Caxinas), with more than 1000 affected people, coming from about 500 families, where 70% of the people develop the illness. ll the analysed Portuguese families presented the same haplotype (haplotype I) associated with the Met 30 mutation. In northern Sweden, more specifically Skellefteå (it is locally called "Skelleftesjukan", the Skellefteå disease), 1.5% of the population has the mutated gene. There are many other populations in the world who exhibit the illness after having developed it independently.
Familial amyloid polyneuropathy
Familial amyloid neuropathy
MGUS polyneuropathy
Distal hereditary motor neuropathy type V
Muscular dystrophy
Charcot–Marie–Tooth disease
Hereditary sensory and autonomic neuropathy type I
Hereditary inclusion body myopathy