Both patients were evaluated for dystonia and ataxia using the Dystonia Movement Scale (DMS, maximum score 120) and Scale for the assessment and rating of ataxia (SARA, maximum
[mdsabstracts.org]
[…] splenomegaly, and progressive, often severe neurological symptoms such as cognitive decline, cerebellar ataxia, vertical supranuclear gaze palsy (VSPG), dysarthria, dysphagia, dystonia
[orpha.net]
NPC could masquerade as a pure neuropsychiatric disorder such as dystonia or schizophrenia.
[ncbi.nlm.nih.gov]