Diagnosis of Fibromyalgia
Bene diagnoscitur, bene curatur
Good diagnosis - good treatment
This Latin proverb is still current. Without a good diagnosis there is no good treatment. This is exactly the dilemma with fibromyalgia. There is no diagnostic test yet that positively confirms a fibromyalgia diagnosis and the symptoms are often diffuse. Many disorders present with very similar symptoms as fibromyalgia e.g. chronic fatigue syndrome, chronic infections (Hepatitis B or C, Lyme disease, EBV), SLE, rheumatoid arthritis (RA) to name just a few. Those other disorders need to be ruled out BEFORE a fibromyalgia diagnosis can be made affirmatively. This means, that patients with fibromyalgia are diagnosed by system of elimination.
Fibromyalgia most often affects young or middle-aged females. Widespread pain is the main symptom. It might be accompanied by fatigue, insomnia, depression, anxiety, cognitive difficulties (known as fibromyalgia fog). All those symptoms greatly impair the patients daily life.
Unfortunately unknown. So far there are hypotheses only. Researchers discovered links between the levels of certain neurotransmitters and symptoms of fibromyalgia. Neurotransmitters are chemicals that transfer signals between cells.
One type of neurotransmitter is called Substance P. One of its functions is to transmit pain sensation to the brain. Studies show that patients with fibromyalgia have elevated levels of Substance P in the spinal fluid, serum and soft tissue.
Serotonin (5-hydroxytryptamine) transfers messages between different areas of the brain. Serotonin regulates the mood, sleep, appetite, memory and libido. Serotonin levels are lower in patients with fibromyalgia.
The “hypothalamus-pituitary-adrenal axis” is part of our hormone system. It regulates our physical response to stress as well as sleep and mood. Researchers noticed abnormalities in this system in fibromyalgia patients.
Researchers found that about one third of fibromyalgia patients have low levels of growth hormone. That would be another hormone system involved in pathogenesis of fibromyalgia.
All above findings have been connected to patients that have fibromyalgia. Unfortunately it is unclear if the changes in neurotransmitters and hormones are the causes of the outbreak of fibromyalgia OR if they are part of the development of the disease (chicken - egg debate).