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Frontotemporal dementia is a heterogeneous pathology with various clinical, histological, and genetic variants. The behavioral variant of frontotemporal dementia (bvFTD) in some cases presents differential diagnostic difficulties when distinguishing from primary mental disorders. The article provides an observation of patient K., who was observed at the initial stage of the disease with a diagnosis of schizophrenia. The comparison of psychopathological and behavioral symptoms with the presence of a family history of amyotrophic lateral sclerosis (ALS) served as a turning point to a different interpretation of the pathology and recognition and confirmation of the “definite diagnosis” — bvFTD.
Е. Г. Менделевич (2024) studied this question.