Behavioral variant of frontotemporal dementia (bv-FTD) is a type of frontotemporal dementia characterized by progressive behavioral impairment and frontal lobe-predominant atrophy. Pick's disease is a neurological condition with symptoms like behavior, personality, or language changes. It involves abnormal substances called Pick bodies containing an abnormal form of the protein tau in nerve cells. Symptoms typically start in the 50s but can occur earlier or later. The disease's progression varies among individuals, and its cause is unknown, with some cases showing a familial pattern.