There is no test to
diagnose Chronic Fatigue Syndrome (CFS). No change in the human
body can be detected except for a few small changes in functioning
of brain that can only be known through very specialized and
expensive brain scans. CFS is a disease of exclusion, which
means ruling out all other conditions and illnesses that may
cause symptoms of CFS. The possible differential diagnoses include:
- Adrenal insufficiency
- Acquired Immune Deficiency Syndrome (AIDS)
- Liver Disease
- Renal Disease
Erythrocyte Sedimentation Rate (ESR):
A consistent extremely low ESR (typically 0-3 mm/h) indicates
CFS in a patient.
Thyroid, Adrenal and liver function
tests: These tests help in excluding disorders
that may consist of a fatigue component.
White Blood Cells (WBC) Count:
The WBC count in CFS patients is normal. An abnormal WBC
count indicates a diagnosis other than CFS.
Serum Protein Electrophoresis
is normal in people suffering from CFS and can be used to
rule out other diseases that cause fatigue such as lymphoma
Imaging Studies: None of the imaging studies such
as Computerized Tomography (CT) Scan of brain and Magnetic Resonance
Imaging (MRI) of brain show normal results for patients suffering
from CFS (7).