Most of the repeat expansion disorders listed in Table 1 have been discussed extensively in literature, however, in the last three years, 12 novel neurological repeat expansion disorders have been classified – these include SCA37, CANVAS, neuronal intranuclear inclusion disease (NIID), OPML, OPDM, OPDM2, FAME1, FAME2, FAME3, FAME6, FAME7 and recessive hereditary motor neuropathy (HMN) (Table 1). Here, SAMD12 is linked to neuronal intranuclear inclusion disease.