# Symptoms and Stages of Frontotemporal Dementia
Frontotemporal dementia (FTD) is a progressive condition that develops in stages. The course is highly individual: in some people it progresses quickly, in others slowly. Moreover, the first symptoms can vary widely, depending on which part of the front and sides of the brain is affected. This page describes the stages and symptoms that commonly occur.
Early phase
In the early stage, changes are often subtle and can easily be attributed to stress, boredom, or personality change. Many people are not diagnosed immediately in this stage.
**Behavioral changes** are often the first sign. Someone may suddenly display inappropriate behavior — for example, making jokes at inappropriate times, without regard for others' feelings. Other forms include apathy (lack of initiative), or conversely impulsivity (acting without thinking). Some people withdraw and become quieter; others become more active but without purpose.
**Changes in social behavior** may be noticeable: less interest in other people, less empathy, or more self-centered behavior. Someone may abandon rules that they previously followed strictly.
**Speech and language problems** can occur, especially in the type called primary progressive aphasia (PPA). This can manifest in difficulty finding words, trouble understanding language, or repeated sentences without meaning.
**Personality changes** are characteristic: a cautious person becomes reckless, a calm person becomes irritable, or someone loses interest in things they previously enjoyed.
**Daily functioning** suffers little to no change in this stage. Many people can still work, drive, and care for themselves. However, those close to them notice that something is different, though they may not always be able to say exactly what. It may take some time before symptoms are severe enough to seek medical help.
In many cases, the early stage lasts **1 to 3 years**, although this varies considerably. Some people have only vague symptoms and a slow progression; others deteriorate more quickly. Diagnosis now often occurs with brain scans (MRI or PET) that can show atrophy (shrinkage) in the front and sides of the brain.
Middle-early stage
In this stage, symptoms become clearer and daily life truly begins to change. Behavioral changes become more pronounced and more difficult for those close to the person to cope with.
**More severe behavioral changes** may occur:
- Aggression or explosive outbursts, sometimes without a clear trigger
- Compulsive behavior — someone repeats the same action over and over, or follows strict, illogical rituals
- Sexually inappropriate behavior (verbal or physical)
- Nighttime restlessness and reversed day-night rhythm (awake at night, sleepy during the day)
- Changed eating behavior — some people eat much more, others much less; some suddenly develop a preference for certain foods
**Apathy becomes stronger**: someone loses initiative, does nothing of their own accord, sits for hours without activity, and does not respond to encouragement from those close to them.
**Speech and language problems increase**, especially in PPA forms:
- Difficulty finding words (anomia)
- Comprehension difficulties (especially in certain PPA types)
- Agrammatism — difficulty with grammar and grammatical words
- Repetitions or echolalia (automatically repeating what someone hears)
**Reasoning and judgment deteriorate**: someone may find it harder to foresee the consequences of actions, abandon caution, or have no insight into their own changes.
**Daily functioning begins to suffer**:
- Household tasks are neglected — someone does not eat well, forgets to clean, or does not care for themselves properly
- Personal hygiene may decline: someone refuses to wash or does not help with washing
- Financial problems may arise because someone spends money irresponsibly
- Most people can no longer work now
- Driving becomes unsafe and usually must be stopped
**Nutrition and weight**: many people eat less or have difficulty eating itself. Malnutrition may develop. In some, the opposite is true: obsessive eating and weight gain.
**Physical symptoms** may begin:
- Muscles become less strong
- Balance may deteriorate
- In some forms of FTD, parkinsonian symptoms may occur (stiffness, slowness of movement)
The **middle-early phase usually lasts 2 to 5 years** after diagnosis, but this varies considerably. Studies of ADL (activities of daily living) and IADL (instrumental activities of daily living) show that dependence gradually increases, but the extent and speed depend heavily on the individual form of FTD and how quickly the brain changes.
Late stage
In the late phase, dependence is almost total. The person needs help with almost everything.
**Behavior becomes less active**: many people are more apathetic and less impulsive. The severe behavioral outbursts that occurred earlier may diminish.
**Communication disappears**: in PPA forms, someone loses the ability to speak. Words are no longer available, and understanding becomes more difficult. Towards the end, only sounds or a few words may remain.
**Physical decline**:
- Muscle tone spreads: especially in later stages, muscles can become very stiff and rigid (in some forms more than in others)
- Swallowing difficulties (dysphagia) become severe — someone has difficulty with deferring food and can no longer properly distinguish between food and saliva
- Fixed moment or permanent contractures (muscle shortening) may occur
- Infections become more likely, especially pneumonia (aspiration pneumonia)
**Nutrition**: many people can no longer feed themselves, and some can no longer eat safely by mouth. Tube feeding (via a tube into the stomach) is sometimes considered, although this is a choice that relatives must determine with difficulty and together with caregivers.
**Incontinence**: both urine and feces may lose control.
**Sleep-wake rhythm**: often very disrupted. Nighttime restlessness, or conversely, much daytime sleeping.
**Seizures**: some patients develop epileptic seizures.
**Lethargy and passivity**: many people sleep a lot and are difficult to wake.
**Physical complications**:
- Pressure sores (decubitus)
- Infections
- Contractures and joint stiffness
The **late phase usually lasts 1 to 3 years**, but there is also considerable variation here. Towards the end, full hospital-level care is needed.
In FTD with ALS features (FTD-ALS), physical symptoms may occur earlier — muscle weakness, muscle tremors, progressive paralysis — and survival may be shorter.
Survival
Survival in frontotemporal dementia is on average shorter than in Alzheimer's. Different sources give:
- **Median survival of approximately 6 to 13 years** after diagnosis (varies depending on the form, sex, education, and genotype).
- **In FTD-ALS** (frontotemporal dementia with amyotrophic lateral sclerosis features), survival is shorter: on average **2 to 5 years** after diagnosis.
- In **primary progressive aphasia** (PPA), a form of FTD, survival can be longer, sometimes more than 10 years.
These figures are population averages. Individual differences are large and depend on many factors: which gene is involved (for example C9orf72, GRN, MAPT), how quickly the brain changes, the presence of ALS features, other health conditions, supportive care, and nutrition. **None of these averages says anything about one person.** Some people live longer, others shorter.
When to contact your doctor
Contact your doctor or specialist if:
- Your behavior changes significantly and others are concerned
- You have severe behavioral outbursts and put yourself or others at risk
- You have difficulty speaking, understanding or eating, and this is getting worse quickly
- You have symptoms of rigidity or muscle stiffness that is improving
- Your nutrition is declining and your weight is dropping
- You have difficulty swallowing or are losing a lot of saliva
- You are continuously restless, not sleeping, or very apathetic
- Your care is no longer sufficient
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_This information never replaces a doctor's judgment. Always discuss your situation with your own healthcare provider._