neurodegenerative disease acquired ataxia superficial siderosis https://www.malacards.org/card/superficial_siderosis Superficial siderosis is a rare neurologic disease characterized by progressive sensorineural hearing loss, cerebellar ataxia, pyramidal signs, and neuroimaging findings revealing hemosiderin deposits in the spinal and cranial leptomeninges and subpial layer. The disease progresses slowly and patients may present with mild cognitive impairment, nystagmus, dysmetria, spasticity, dysdiadochokinesia, dysarthria, hyperreflexia, and Babinski signs. Additional features reported include dementia, urinary incontinence, anosmia, ageusia, and anisocoria. superficial hemosiderosis of the CNS MEDGEN:1371500 GARD:0009484 Orphanet:247245 superficial siderosis of the central nervous system superficial siderosis of the CNS MONDO:0016594 hemosiderosis of the central nervous system UMLS:C2938918 superficial hemosiderosis of the central nervous system NANDO:1200543