Frontotemporal dementia is a cause of behavioral disturbance that usually appears in individuals between 45 and 65 years of age. The authors present the case of a 65-year-old patient that illustrates how frontotemporal dementia can be misdiagnosed based on a behavioral pattern that suggests the presence of a primary mood disorder. Early accurate diagnosis of frontotemporal dementia and subsequent supportive measures can allow patients and families to make important decisions about business and legal affairs and how to spend remaining leisure time in the most meaningful and enjoyable way possible.