Neuroacanthocytosis is an infrequent cause of both neurological and psychiatric manifestations, and acanthocytes, which are a special form of spiculated red blood cells. Clinically significant psychopathology, ranging from behavioural disturbance to frank psychiatric illness, has been reported to occur in up to 60% of ChAc patients.

A review was conducted aiming to clarify the physiopathology of this illness and its clinical features in order to distinguish neuroacanthocytosis from other neurological or psychiatric diseases. The literature search was conducted in PubMed data reviewing articles dating between 2010 and 2016.

– Neuroacanthocytosis autosomal recessive disorder associated with mutations or deletions in the VPS13A gene on chromosome 9q, which codes for the membrane protein chorein. Chorein is strongly expressed in the brain. Chorein loss particularly affects the basal ganglia, especially the caudate nucleus and putamen;

– Dysexecutive syndromes, OCD, depression and possibly psychosis, which may precede the frank motor and cognitive impairment;

– The most recently developed treatment for neuroacanthocytoses is the use of deep-brain stimulation (DBS), with stimulation of the globus pallidus internus.

While conducting a neurological exam, secondary causes of psychosis have to be included in the differential diagnosis. It is important to notice the possible confusion between tardive dyskinesia and a primary movement disorder. It should be necessary to investigate all de novo movement disorders in psychotic patients in order to eliminate etiologies other than iatrogenic ones.

The authors have not supplied their declaration of competing interest.