We report the case of a 71-year-old woman with no complaints except for visual hallucinations. She was examined by a psychiatrist and organic hallucinosis was diagnosed followed by antipsychotic medication.
However, progressive worsening occurred, namely deterioration of daily functioning, delirium, intensified visual hallucinations, behavioral disturbances, parkinsonism and loss of mobility. The patient died after a total duration of twenty months after first symptomatology.
Autoptic neurohistopathological examination was performed and combination of different neurodegenerations was diagnosed and dementia with Lewy bodies was fully developed as a leading disease. The main aim of this article is to raise awareness of the dementia with Lewy bodies as a possible cause of new-onset psychosis in later life with the need to respect therapeutic recommendations.