DDHD2 and Familial paroxysmal ataxia: Of the remaining 129, 56 (43%) had FRDA and 18 (14%) had a different type of inherited ataxia (Non-FRDA): these included ataxia-telangiectasia (n = 4), ataxia with oculomotor ataxia type 1 (n = 2), X-linked tremor/ataxia syndrome (FXTAS) (n = 2), episodic ataxia (n = 1), hereditary spastic paraplegia (n = 5; including SPG7-associated spastic ataxia (2), SPG54-spastic ataxia (2) and 1 unspecified), SCA (n = 3; including individuals with SCA2, SCA6 and SCA14) and SCAR10 (n = 1).