Isolated delusion: an uncommon feature in idiopathic Parkinson’s disease

Abstract

Objectives:Characterize a subgroup of Parkinson's Disease (PD) patients with isolated delusions (ID). Background:PD patients are particularly prone to develop psychotic symptoms due to the disease itself and to dopaminergic treatments. Visual hallucinations, with or without delusions, are the classic manifestation, mainly associated with disease progression and cognitive deterioration. However, a distinct subset may develop ID. Materials and Methods:PD patients followed by the authors between 01.01.2014 and 31.01.2018 at a movement disorders clinic were identified using the ICD9 code 3320. Charts were retrospectively reviewed to identify patients with ID. Neurological and Psychiatric interviews were performed, including MDS-UPDR, MoCA, NPI, SCOPA-PC, HAM-D.