出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/12/18 21:20:43」(JST)
Polymyalgia rheumatica | |
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In polmyalgia rheumatica, pain is usually located in the shoulders and hips.
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Classification and external resources | |
Specialty | Rheumatology |
ICD-10 | M35.3 |
ICD-9-CM | 725 |
DiseasesDB | 10331 |
MedlinePlus | 000415 |
eMedicine | emerg/473 |
Patient UK | Polymyalgia rheumatica |
MeSH | D011111 |
Polymyalgia rheumatica (which takes its name from the word Πολυμυαλγία "polymyalgia" which means "pain in many muscles" in medical-scientific Greek) abbreviated as PMR, is a syndrome with pain or stiffness, usually in the neck, shoulders, upper arms, and hips, but which may occur all over the body. The pain can be very sudden, or can occur gradually over a period. It may be caused by an inflammatory condition of blood vessels such as temporal arteritis. It is thought to be brought on by a viral or bacterial illness or trauma of some kind, but genetics does play a factor as well. Persons of N. European ancestry are much more prone to this illness (U.K., Ireland, Scandinavian countries, etc.).
Most PMR sufferers wake up in the morning with pain in their muscles; however, cases have occurred in which the patient has developed the pain during the evenings or has pain and stiffness all day long.[1] Patients who have polymyalgia rheumatica may also have temporal arteritis, an inflammation of blood vessels in the face which can cause blindness if not treated quickly. It is not a "cookie cutter" illness, meaning that patients have differing symptoms, length of illness, course of treatment. That is why it is such a mysterious and difficult to diagnose disease. There is no true and certain laboratory test, but CRP (C-reactive protein) and ESR (Erythrocyte Sedimentation Rate) can be indicators of inflammation.
The pain and stiffness can be debilitating if not treated, and can lead to severe depression.
PMR is usually treated with courses of oral corticosteroids.[2] Most people need to continue the corticosteroid treatment for two to three years.[3] PMR sometimes goes away on its own in a year or two, but medications and self-care measures can improve the rate of recovery.[4]
PMR was first established as a distinct disease in 1966 by a case report[5] on 11 patients at Mount Sinai Hospital in New York, NY.[6]
A wide range of symptoms can indicate if a person has polymyalgia rheumatica. The classic symptoms include:
About 15% of people who are diagnosed with polymyalgia rheumatica also have temporal arteritis, and about 50% of people with temporal arteritis have polymyalgia rheumatica. Some symptoms of temporal arteritis include headaches, scalp tenderness, jaw or facial soreness, distorted vision, or aching in the limbs caused by decreased blood flow, and fatigue.[1]
The cause of PMR is not well understood. The pain and stiffness result from the activity of inflammatory cells and proteins that are normally a part of the body's disease-fighting immune system, and the inflammatory activity seems to be concentrated in tissues surrounding the affected joints.[8] During this disorder, the white blood cells in the body attack the lining of the joints, causing inflammation.[9] Inherited factors also play a role in the probability that an individual will develop PMR. Several theories have included viral stimulation of the immune system in genetically susceptible individuals.[10]
Infectious disease may be a contributing factor. This would be expected with sudden onset of symptoms, for example. In addition, appearance of new cases often appears in cycles in the general population, implying a viral connection. Studies are inconclusive, but several somewhat common viruses were identified as possible triggers for PMR.[8] The viruses thought to be involved include the adenovirus, which causes respiratory infections; the human parvovirus B19, an infection that affects children; and the human parainfluenza virus.[9] Some sufferers attribute the onset of PMR to stress.
Persons having the HLA-DR4 type of human leucocyte antigen appear to have a higher risk of PMR.[11]
No specific test exists to diagnose polymyalgia rheumatica; many other diseases can cause inflammation and pain in muscles, but a few tests can help narrow down the cause of the pain. Limitation in shoulder motion, or swelling of the joints in the wrists or hands, are noted by the doctor.[10] A patient's answers to questions, a general physical exam, and the results of tests can help a doctor determine the cause of pain and stiffness.[12]
One blood test usually performed is the erythrocyte sedimentation rate (ESR) which measures how fast the patient's red blood cells settle in a test tube. The faster the blood cells settle, the higher the ESR value, which means inflammation is present. Many conditions can cause an elevated ESR, so this test alone is not proof that a person has polymyalgia rheumatica.[12][13]
Another test that checks the level of C-reactive protein (CRP) in the blood may also be conducted. CRP is produced by the liver in response to an injury or infection, and people with polymyalgia rheumatica usually have high levels.[12][13] However, like the ESR, this test is also not very specific.
Polymyalgia rheumatica is sometimes associated with temporal arteritis, a condition requiring more aggressive therapy. To test for this additional disorder, a biopsy sample may be taken of the temporal artery.[12]
Prednisone is the drug of choice for PMR,[14] and treatment duration is frequently greater than one year.[10] If the patient does not experience dramatic improvement after three days of 10–20 mg oral prednisone per day, the diagnosis should be reconsidered.[15] Sometimes relief of symptoms occurs in only several hours.
Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen are ineffective in the initial treatment of PMR,[16] but they may be used in conjunction with the maintenance dose of corticosteroid.[17]
Along with medical treatment, patients are encouraged to exercise and eat healthily. Exercise will help strengthen the weak muscles, and help to prevent weight gain. A healthy diet will help to keep a strong immune system, and also help build strong muscles and bones.[18] Patients are encouraged to eat a diet of fruits, vegetables, whole grains, and low-fat meat and dairy products, avoiding foods with high levels of refined sugars and salt.[19]
No circumstances are certain as to which an individual will get polymyalgia rheumatica, but a few factors show a relationship with the disorder.
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リンク元 | 「リウマチ性多発筋痛症」「PMR」 |
関連記事 | 「rheumatic」「rheumatica」 |
項目 | エコー無し | エコー有り |
朝のこわばり(≧45分) | 2 | 2 |
臀部の痛み and/or 可動域制限 | 1 | 1 |
RF陰性+抗CCP抗体陰性 | 2 | 2 |
肩と腰以外の関節に症状無し | 1 | 1 |
関節エコーで一箇所以上の肩関節+一箇所以上の股関節に滑液包炎 (肩:三角筋下滑液包炎 or 上腕二頭筋腱鞘滑膜炎 or 肩甲上腕筋滑膜炎) (股:股関節滑膜炎 or 大転子部滑液包炎) |
1 | |
関節エコーで両側の肩関節に滑液包炎 (三角筋下滑液包炎 or 上腕二頭筋腱鞘滑膜炎 or 肩甲上腕筋滑膜炎) |
1 | |
計 | ≧4点 | ≧5点 |
感度 | 65% | 66% |
特異度 | 78% | 81% |
プレドニゾロン投与量 | 投与期間 |
12.5mg~25mg (0.25~0.3mg/kg) |
4~8週で10mgまで減量 |
10mg | 4週 |
9mg | 4週 |
8mg | 4週 |
7mg | 4週 |
6mg | 4週 |
5mg | 4週 |
4mg | 4週 |
3mg | 4週 |
2mg | 4週 |
1mg | 4週 |
中止 | 4週 |
リウマチ性の
.