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Neuromuscular diseases

Creutzfeldt-Jakob disease (CJD)

A very rare disease caused by a faulty protein building up in the brain. Memory, behavior and movement worsen quickly.

Not part of the panel of Türkiye's National Newborn Screening Programme (heel-prick test). Source

This page is translated from the Turkish original.

This disease is followed through the “Neuromuscular diseases” group.

Understanding the disease

This section has not yet been reviewed by a physician. It summarises patient information from sources such as MedlinePlus, Orphanet and the NHS in plain language. The disease can differ from person to person; talk to your doctor about diagnosis and treatment.

What happens in this disease?

CJD is a prion disease. A prion is a brain protein that has changed its shape. This protein also changes normal proteins and builds up in the brain. Nerve cells die and the brain is damaged. The most common type is sporadic CJD; its cause is unknown.

Which symptoms can occur?

Symptoms progress quickly.

  • Memory loss and decline in thinking
  • Changes in personality and behavior
  • Loss of balance and coordination
  • Slurred speech
  • Vision problems
  • Involuntary, sudden muscle jerks
  • Over time, dependence on others for movement and daily tasks

How is it diagnosed?

The diagnosis is made by a neurologist, who rules out similar diseases. A brain MRI, an EEG and a lumbar puncture to take fluid from the lower back are done. For the familial type, a genetic test is done on blood. A definite diagnosis can only be made by examining brain tissue.

Treatment and care

There is currently no cure for CJD. Treatment aims to ease symptoms and keep the person comfortable. Medicines can be used for anxiety, depression and pain. Many people need care and feeding support over time. The doctor who follows the disease decides which treatment is suitable.

For the family: inheritance and genetic counselling

Sporadic CJD and types acquired from outside the body are not inherited. Between 10 and 15% of prion diseases are the familial type. This type is caused by a change in the PRNP gene and is passed on through dominant inheritance. The chance that an affected parent passes it on to each child is 1 in 2. People with a prion disease in the family can get genetic counselling.

Source: NHS: Creutzfeldt-Jakob disease · NHS: Creutzfeldt-Jakob disease – Diagnosis · MedlinePlus Genetics: Prion disease · Orphanet: Sporadic Creutzfeldt-Jakob disease (ORPHA:204)

Key facts

How common is it?
Prevalence: <1 per 1 000 000 (Worldwide) · New cases per year: 1-9 per 1 000 000 (Worldwide)
When does it usually start?
Adulthood, Older age

These facts are taken from Orphanet and MedlinePlus records (last checked: October 7, 2026). Frequency values are approximate ranges.

You are not alone: patient associations in Türkiye

Non-profit patient and family organizations in Türkiye working on this disease or disease group. Links are for information; Doktorclub is not affiliated with these organizations and does not endorse them.

We could not find a patient association specific to this disease.

For all rare diseases: Nadir Hastalıklar Federasyonu

Support and help

Doktorclub does not diagnose, recommend treatments or refer you to hospitals or doctors. These pages are meant to help you talk with your doctor.

News about CJD

Clinical trials (ClinicalTrials.gov)

A clinical trial is a regulated study that tests whether a new treatment is safe and whether it works, in patients who volunteer. Most trials look for a certain age, genetic change and health condition. Taking part is voluntary.

This list is not a treatment recommendation. Treatments tested in phase 1–3 trials are investigational (experimental): their efficacy and safety have not yet been proven and they are not approved treatments. Taking part depends on each trial’s criteria and a physician’s assessment; the first step is to talk to the doctor who manages your care.

Questions you can ask your doctor

  • Could this trial be suitable for us?
  • If we take part, how would current treatment and check-ups be affected?
  • Where does the trial take place, and how are travel and accommodation handled?
  • What happens if we want to leave the trial?

ClinicalTrials.gov lists 2 active interventional studies for this disease. 1 is recruiting now; none has a site in Türkiye. Last checked: October 7, 2026.

Selected records (studies with a site in Türkiye first):

See all studies on ClinicalTrials.gov · Joining clinical trials

Neuromuscular diseases: other news

Medical codes (for talking with your doctor and finding sources)

These codes identify the disease in international classifications and databases. They can help when you talk with your doctor or look for reliable sources.

Orphanet code: ORPHA:204 · ICD-11 8E00

Codes checked against WHO ICD-11 and Orphanet on October 7, 2026.

This page provides general information and does not replace diagnosis or treatment. Talk to your doctor about symptoms, diagnosis and treatment.

The information on these pages is for general information only and does not replace medical advice. Talk to your doctor about diagnosis and treatment decisions. In an emergency in Türkiye, call 112.

Every update is based on an open source and labeled with its level of evidence. No advertising and no drug brand names. Our scientific principles

This page was translated from Turkish by the Doktorclub editorial team.