has material basis in germline mutation in CACNB4 episodic ataxia type 5 https://www.malacards.org/card/episodic_ataxia_type_5_2 SCTID:718756005 Orphanet:211067 episodic ataxia, type 5 UMLS:C1866039 MONDO:0013464 Episodic ataxia type 5 (EA5) is an extremely rare form of Hereditary episodic ataxia characterized by recurrent episodes of vertigo and ataxia lasting several hours. GARD:0017113 DOID:0050993 MEDGEN:356142 OMIM:613855 EA5 hereditary episodic ataxia caused by mutation in CACNB4 CACNB4 hereditary episodic ataxia MESH:C566601 hereditary episodic ataxia