2025, Number 2
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Rev Fac Med UNAM 2025; 68 (2)
Delusional Parasitosis and Folie ŕ Deux: A Case Report of Shared Psychosis in a Patient with Vascular Cognitive Impairment
Ruiz SNA, González GC
Language: Spanish
References: 16
Page: 26-37
PDF size: 307.12 Kb.
ABSTRACT
This report describes the clinical case of a 57-year-old man
with
Folie ŕ
Deux (FaD), a history of systemic arterial hypertension
(SAH), harmful alcohol and methamphetamine use,
and mild cognitive impairment secondary to small vessel disease.
He subsequently developed delusional parasitosis (DP),
accompanied by complex visual and tactile hallucinations,
interpreting aberrant skin sensations as a parasitic infestation.
This conviction was shared by his wife, who adopted the delusional
belief despite not experiencing hallucinations herself.
The patient’s final diagnosis included mild neurocognitive
disorder with delusions and hallucinations, associated with
small vessel disease. After treatment with aripiprazole, the
patient showed partial improvement in his hallucinations,
although the delusional belief persisted.
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