Differentiating Fibromyalgia from other diseases

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Differentiating Fibromyalgia from other Diseases

Fibromyalgia must be differentiated from other diseases that present with pain, fatigue and sleep disturbance, and symptoms of cognitive dysfunction and psychiatric disease such as rheumatoid arthritis, SLE, chronic fatigue syndrome, spondyloarthritis, polymyalgia rheumatica.[1][2][3][4][5]

Disease Differentiating signs and symptoms Differentiating labs
Rheumatoid arthritis
  • Multiple joint swelling
  • Morning stiffness
  • Rheumatoid nodules
  • RF or anti-cyclic citrullinated protein (CCP) antibody is positive.
  • Markers of systemic inflammation (ESR, CRP) are typically elevated.
SLE
  • Maculopapular rash
  • Multi-system involvement
  • Positive anti-Smith antibodies
Chronic fatigue syndrome
  • Fatigue plus 4 of the following symptoms
  • (1) Short-term memory loss
  • (2) Sore throat
  • (3) tender lymph nodes in the neck or armpit
  • (4) muscle pain
  • (5) joint pain without swelling or redness
  • (6) headaches
  • (7) unrefreshing sleep
  • (8) malaise
  • Diagnosis of exclusions
  • Symptoms must present for more than 6 months
Spondyloarthritis
  • Axial skeletal pain and stiffness
  • Restricted spinal motion
  • Elevated ESR or CRP
  • Negative RF
  • Bamboo spine on X-ray
Polymyalgia rheumatica
  • Older at onset 
  • Generalized stiffness
  • An elevated erythrocyte sedimentation rate (ESR) OR C-reactive protein (CRP
  • Response to corticosteroids
Osteoarthritis 
  • Localized joint pain
  • Restricted to affect joints
  • Older at onset
  • Xray of the involved joints demonstrate degenerative changes
Hypothyroidism
  • Systemic symptoms such as weight gain, constipation, dry skin
  • Muscular aching and prominent fatigue that improves on replacement of thyroid hormone.
  • TSH is elevated and free T4 is low.
Myopathaies(polymyositis and dermatomyositis)
  • Pelvic and shoulder girdle muscle weakness
  • Rash
  • Muscle biopsy confirms the diagnosis
  • Elevated CPK enzyme
Neuropathy
  • Numbness and tingling
  • Paresthesia
  • Abnormal EMG

References

  1. Goldenberg DL, Burckhardt C, Crofford L (2004). "Management of fibromyalgia syndrome". JAMA. 292 (19): 2388–95. doi:10.1001/jama.292.19.2388. PMID 15547167.
  2. Clauw DJ (2014). "Fibromyalgia: a clinical review". JAMA. 311 (15): 1547–55. doi:10.1001/jama.2014.3266. PMID 24737367.
  3. Borchers AT, Gershwin ME (2015). "Fibromyalgia: A Critical and Comprehensive Review". Clin Rev Allergy Immunol. 49 (2): 100–51. doi:10.1007/s12016-015-8509-4. PMID 26445775.
  4. Häuser W, Burgmer M, Köllner V, Schaefert R, Eich W, Hausteiner-Wiehle C, Henningsen P (2013). "[Fibromyalgia syndrome as a psychosomatic disorder - diagnosis and therapy according to current evidence-based guidelines]". Z Psychosom Med Psychother (in German). 59 (2): 132–52. doi:10.13109/zptm.2013.59.2.132. PMID 23775553.
  5. Eich W, Häuser W, Friedel E, Klement A, Herrmann M, Petzke F, Offenbächer M, Schiltenwolf M, Sommer C, Tölle T, Henningsen P (2008). "[Definition, classification and diagnosis of fibromyalgia syndrome]". Z Rheumatol (in German). 67 (8): 665–6, 668–72, 674–6. doi:10.1007/s00393-008-0404-4. PMID 19050952.

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