Quick Answer
Frontotemporal dementia causes personality changes, disinhibition and language problems — often in patients under 65, misdiagnosed as psychiatric illness.
Medically reviewed by Dr. Jitendra Prasad Yadav • NMC 8029 • Kathmandu Neurology Clinic & Cognitive Center
Frontotemporal dementia (FTD) is a group of neurodegenerative disorders caused by degeneration of the frontal and temporal lobes of the brain. It typically presents before age 65 (unlike Alzheimer's which is usually later) and causes prominent changes in personality, behavior and language — often before memory loss becomes apparent.
Behavioral variant (bvFTD)
Early personality changes: disinhibition (inappropriate comments, loss of social filters), apathy (loss of motivation, interest), loss of empathy, compulsive behaviors, hyperorality (putting inappropriate objects in mouth), dietary changes. Often misdiagnosed as depression, bipolar disorder, or personality disorder.
Primary progressive aphasia (PPA)
Language deficits: difficulty finding words (semantic variant), effortful speech with preserved comprehension (nonfluent variant), or both (logopenic variant). Often misdiagnosed as psychiatric illness or early Alzheimer's.
Diagnosis and treatment
MRI shows frontal/temporal atrophy. FDG-PET may show characteristic patterns. Genetic testing (C9orf72, MAPT, GRN mutations) for familial cases (~40%). No disease-modifying treatment — symptomatic management, SSRIs for behavioral symptoms, speech therapy for PPA, caregiver support essential.
When to seek professional evaluation
FTD is often misdiagnosed as psychiatric illness — personality changes in patients under 65 deserve neurological evaluation.
This guide is educational and does not replace individual medical advice.
Frequently asked questions
Answers reviewed by Dr. Jitendra Prasad Yadav • MBBS, MD (Internal Medicine), FICN (Neurology), FCNV, FIHM • NMC 8029
Early discussion is helpful when concerns affect daily life; screening approach is individualized.
No; occasional lapses, stress-related memory changes, and other conditions can affect memory. Persistent functional impact warrants evaluation.
Migraine is a neurological condition; headache is one feature. Associated symptoms and functional impact are important for diagnosis.
Aura refers to visual, sensory, or speech symptoms that precede the headache in some people. Both types are migraine; the presence of aura may influence management discussion.
More: All FAQs → · Ask Dr. Jitendra →
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References & Review
Reviewed by Dr. Jitendra Prasad Yadav • Last reviewed: 2026-11-10
- International Classification of Headache Disorders, 3rd edition (ICHD-3).
- Harrison's Principles of Internal Medicine — Neurology sections.
- American Academy of Neurology guidelines for selected conditions (where applicable).
Content is educational and aligns with standard medical references; individual evaluation may vary. External links provide context and do not imply endorsement.