The list of medical tests mentioned in various sources as used in the diagnosis of Creutzfeldt-Jakob Disease includes:
There is currently no single diagnostic test for CJD. When a doctor suspects CJD, the first concern is to rule out treatable forms of dementia such as encephalitis (inflammation of the brain) or chronic meningitis. A neurological examination will be performed and the doctor may seek consultation with other physicians. Standard diagnostic tests will include a spinal tap to rule out more common causes of dementia and an electroencephalogram (EEG) to record the brain's electrical pattern, which can be particularly valuable because it shows a specific type of abnormality in CJD. Computerized tomography of the brain can help rule out the possibility that the symptoms result from other problems such as stroke or a brain tumor. Magnetic resonance imaging (MRI) brain scans also can reveal characteristic patterns of brain degeneration that can help diagnose CJD.
The only way to confirm a diagnosis of CJD is by brain biopsy or autopsy. In a brain biopsy, a neurosurgeon removes a small piece of tissue from the patient's brain so that it can be examined by a neuropathologist. This procedure may be dangerous for the patient, and the operation does not always obtain tissue from the affected part of the brain. Because a correct diagnosis of CJD does not help the patient, a brain biopsy is discouraged unless it is needed to rule out a treatable disorder. In an autopsy, the whole brain is examined after death. (Source: excerpt from Creutzfeldt-Jakob Disease Fact Sheet: NINDS)
There is currently no single diagnostic test for CJD. The first concern is to rule out treatable forms of dementia such as encephalitis or chronic meningitis. The only way to confirm a diagnosis of CJD is by brain biopsy or autopsy. In a brain biopsy, a neurosurgeon removes a small piece of tissue from the patient's brain so that is can be examined by a neurologist. Because a correct diagnosis of CJD does not help the patient, a brain biopsy is discouraged unless it is need to rule out a treatable disorder. (Source: excerpt from NINDS Creutzfeldt-Jakob Disease Information Page: NINDS)
In 1996, researchers developed a test that helps doctors diagnose CJD in patients with symptoms. Before, when a patient had CJD symptoms, only a brain biopsy, which requires major surgery, could confirm the diagnosis. Now doctors can detect an abnormal protein in a sample of spinal fluid. It is much easier to take a sample of spinal fluid for diagnosis than to do a brain biopsy. However, this test cannot be used to identify patients without symptoms or to predict who may develop CJD in the future. (Source: excerpt from Update Follow-Up Study of NHPP Growth Hormone Recipients: NIDDK)
In a recent issue of Lancet, British researchers reported success using magnetic resonance imaging (MRI) to diagnose variant CJD in people with symptoms of the disease. (View the article. ) Further studies will show whether MRI proves useful in diagnosing other forms of CJD. (Source: excerpt from Update Follow-Up Study of NHPP Growth Hormone Recipients: NIDDK)
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Conductive (CHL)
Source: In A Page: Pediatric Signs and Symptoms, 2007
CJD must be considered for anyone experiencing signs of progressive dementia. Neurologic examination is the most effective tool in diagnosing CJD. Difficulty with rapid alternating movements and point-to-point movements are typically evident early in the disease.
An EEG may be performed to assess the patient for typical changes in brain wave activity. Computed tomography scan, magnetic resonance imaging of the brain, and lumbar puncture may be useful in ruling out other disorders that cause dementia. Though not diagnostic, presence of the 14-3-3 protein in the spinal fluid is highly suggestive of the disease when it’s accompanied by other characteristic symptoms. Definitive diagnosis usually isn’t obtained until an autopsy is done and brain tissue is examined.
Source: Professional Guide to Diseases (Eighth Edition), 2005
CJD must be considered for anyone experiencing signs of progressive dementia. Neurologic examination is the most effective tool in diagnosing CJD. Difficulty with rapid alternating movements and point-to-point movements are typically evident early in the disease.
An electroencephalogram may also be performed to assess the patient for typical changes in brain wave activity. Computed tomography scan, magnetic resonance imaging of the brain, and lumbar puncture may be useful in ruling out other disorders that cause dementia. Definitive diagnosis usually isn’t obtained until an autopsy is done and brain tissue is examined.
Source: Handbook of Diseases, 2003
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