2010). Giffin et al. (2002) described a 3 year old male with FHM and ataxia symptoms linked to a nonsense mutation (p.Tyr1853Ter) in exon 37 in the CACNA1A gene, the attacks being unresponsive to treatment with acetazolamide. In a similar overlapping case, the mutation p.Asp302Asn (reported here in Case 13) was reported in 2014 by Jaffer et al. in a patient with episodic ataxia (Jaffer et al. [Link]), whereas the same mutation was described by Burk et al. (2014) in a German patient with dominant cerebellar ataxia and absence of recurrent ataxic episodes, see (Burk et al. 2014). The gene discussed is CACNA1A; the disease is Familial paroxysmal ataxia.