Difference between revisions of "Systemic lupus erythematosus"

(Fever in SLE)
(Differential Diagnosis)
 
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==Background==
 
==Background==
 
*Autoimmune disorder affecting all systems
 
*Autoimmune disorder affecting all systems
 +
*Also consider drug induced lupus
  
==Epidemiology==
+
===Epidemiology===
 
*Female:Male 10:1
 
*Female:Male 10:1
 
*Peak in 20s-30s
 
*Peak in 20s-30s
*More common in African Americans
+
*More common in Black patients
 
 
  
 
==Clinical Features==
 
==Clinical Features==
 
'''SLICC Classification Criteria 2012''' <ref>Lisnevskaia L, et al. Systemic Lupus Erythematosus. Lancet. 2014 May 29. Epub ahead of print.</ref>
 
'''SLICC Classification Criteria 2012''' <ref>Lisnevskaia L, et al. Systemic Lupus Erythematosus. Lancet. 2014 May 29. Epub ahead of print.</ref>
 
 
Requirements: >4 of the following criteria (at least 1 clinical and 1 laboratory) '''OR''' biopsy proven lupus nephritis with  
 
Requirements: >4 of the following criteria (at least 1 clinical and 1 laboratory) '''OR''' biopsy proven lupus nephritis with  
 
positive ANA or Anti-dsDNA
 
positive ANA or Anti-dsDNA
Line 27: Line 26:
  
 
*Immunological criteria
 
*Immunological criteria
 
 
**ANA
 
**ANA
 
**Anti-dsDNA
 
**Anti-dsDNA
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==Differential Diagnosis==
 
==Differential Diagnosis==
 
*[[Rheumatoid arthritis]]
 
*[[Rheumatoid arthritis]]
*Sjogren's syndrome
+
*[[Sjögren Syndrome]]
 
*[[Dermatomyositis]]
 
*[[Dermatomyositis]]
*Polymyositis
+
*[[Polymyositis]]
 
*[[Stevens Johnson Syndrome and Toxic Epidermal Necrolysis|Stevens-Johnson syndrome]]
 
*[[Stevens Johnson Syndrome and Toxic Epidermal Necrolysis|Stevens-Johnson syndrome]]
 
*[[Stevens Johnson Syndrome and Toxic Epidermal Necrolysis|Toxic Epidermal Necrolysis]]
 
*[[Stevens Johnson Syndrome and Toxic Epidermal Necrolysis|Toxic Epidermal Necrolysis]]
 
*[[Septic Arthritis]]
 
*[[Septic Arthritis]]
 
*[[Lyme Disease]]
 
*[[Lyme Disease]]
*Vasculitis
+
*[[Vasculitis]]
 
*[[Acute Rheumatic Fever]]
 
*[[Acute Rheumatic Fever]]
 
*[[Toxic Shock Syndrome]]
 
*[[Toxic Shock Syndrome]]
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*[[Idiopathic Thrombocytopenic Purpura|ITP]]
 
*[[Idiopathic Thrombocytopenic Purpura|ITP]]
 
*[[DIC]]
 
*[[DIC]]
 +
 +
{{Differential Diagnosis Polyarthritis}}
  
 
{{Glomerulonephritis causes}}
 
{{Glomerulonephritis causes}}
  
==Workup==
+
==Evaluation==
 
'''Undiagnosed'''
 
'''Undiagnosed'''
 
*CBC
 
*CBC
Line 99: Line 99:
 
*ANA
 
*ANA
 
*ESR
 
*ESR
*UA
+
*[[Urinalysis]]
 
*Bedside echo if ill or hypotensive
 
*Bedside echo if ill or hypotensive
 
*(Consider anti-DNA, anti-Smith, anti-Nuclear, anti-phospholipid, C3,C4, direct Coombs')
 
*(Consider anti-DNA, anti-Smith, anti-Nuclear, anti-phospholipid, C3,C4, direct Coombs')
Line 107: Line 107:
 
*CBC
 
*CBC
 
*Chem
 
*Chem
*UA
+
*[[Urinalysis]]
 
*Urine pregnancy
 
*Urine pregnancy
 
*As directed by organ system involved
 
*As directed by organ system involved
 +
 +
'''Drug Induced Lupus'''
 +
*Anti-histone-Ab positive 95% of the time
 +
*Make sure to review medications
 +
**High risk:
 +
***Procainamide (antiarrhythmic)
 +
***Hydralazine (antihypertensive)
 +
**Moderate to low risk:
 +
***Infliximab anti (TNF-α)
 +
***Etanercept anti (TNF-α)
 +
***Isoniazid (antibiotic)
 +
***Minocycline (antibiotic)
 +
***Pyrazinamide (antibiotic)
 +
***Quinidine (antiarrhythmic)
 +
***D-Penicillamine (anti-inflammatory)
 +
***Carbamazepine (anticonvulsant)
 +
***Oxcarbazepine (anticonvulsant)
 +
***Phenytoin (anticonvulsant)
 +
***Propafenone (antiarrhythmic)
 +
***Chlorpromazine (antipsychotic)
  
 
===Fever in SLE===
 
===Fever in SLE===
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*Infectious
 
*Infectious
 
**Stress dose steroids with hydrocortisone 100mg IV Q8hr if on or recently on steroids
 
**Stress dose steroids with hydrocortisone 100mg IV Q8hr if on or recently on steroids
 
 
*Dermatologic
 
*Dermatologic
 
**Hydrocortisone 1% cream
 
**Hydrocortisone 1% cream
 +
*If drug induced lupus, stop medication and consider alternative
  
 
==Disposition==
 
==Disposition==
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*Mild flairs can have expedited out patient management
 
*Mild flairs can have expedited out patient management
 
*Musculoskeletal symptoms can usually be managed as out patients
 
*Musculoskeletal symptoms can usually be managed as out patients
*Chest pain requires urgent ACS evaluation
+
*[[Chest pain]] requires urgent ACS evaluation
 
*Infections usually require admission for antibiotics and systemic corticosteroids
 
*Infections usually require admission for antibiotics and systemic corticosteroids
  
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*[[Adrenal Crisis]]
 
*[[Adrenal Crisis]]
  
==Sources==
+
==References==
*Rosen's
 
*Up to date
 
 
 
 
<references/>
 
<references/>
  
[[Category: Rheum]]
+
[[Category:Rheumatology]]

Latest revision as of 07:26, 17 August 2017

Background

  • Autoimmune disorder affecting all systems
  • Also consider drug induced lupus

Epidemiology

  • Female:Male 10:1
  • Peak in 20s-30s
  • More common in Black patients

Clinical Features

SLICC Classification Criteria 2012 [1] Requirements: >4 of the following criteria (at least 1 clinical and 1 laboratory) OR biopsy proven lupus nephritis with positive ANA or Anti-dsDNA

  • Clinical criteria
    • Malar rash, bullous lupus, photosensitivity
    • Discoid rash, hypertrophic lupus
    • Oral ulcers or nasal ulcers
    • Non-scarring alopecia
    • Synovitis
    • Serositis
    • Nephritis
    • Cerebritis, myelitis, neuropathy
    • Hemolytic anemia
    • Leukopenia or lymphopenia
    • Thrombocytopenia
  • Immunological criteria
    • ANA
    • Anti-dsDNA
    • Anti-Sm
    • Antiphospholipid antibody
    • Low complement C3, low C4
    • Direct Coombs' test in the absence of haemolytic anaemia

Organ system affected:

  • Musculoskeletal
    • Arthritis
      • Usually symmetric
      • Consider septic arthritis if there is a single inflamed joint
        • Cover for Salmonella in addition to standard coverage
  • GI
    • Lupus enteritis (mesenteric vasculitis)
      • Most common cause of acute abdominal pain
    • Pancreatitis
    • PUD
  • Dermatologic
    • Malar rash across bridge of nose
    • Discoid rash, erythematous with scale
    • Treat with topical 1% hydrocortisone
  • Renal
    • Usually a nephritis
    • Can cause a glomerulonephrosis

Differential Diagnosis

Polyarthritis

Algorithm for Polyarticular arthralgia

Causes of Glomerulonephritis

Evaluation

Undiagnosed

  • CBC
  • Chem 10
  • Urine pregnancy
  • ANA
  • ESR
  • Urinalysis
  • Bedside echo if ill or hypotensive
  • (Consider anti-DNA, anti-Smith, anti-Nuclear, anti-phospholipid, C3,C4, direct Coombs')

Flare

  • Bedside echo if ill or hypotensive
  • CBC
  • Chem
  • Urinalysis
  • Urine pregnancy
  • As directed by organ system involved

Drug Induced Lupus

  • Anti-histone-Ab positive 95% of the time
  • Make sure to review medications
    • High risk:
      • Procainamide (antiarrhythmic)
      • Hydralazine (antihypertensive)
    • Moderate to low risk:
      • Infliximab anti (TNF-α)
      • Etanercept anti (TNF-α)
      • Isoniazid (antibiotic)
      • Minocycline (antibiotic)
      • Pyrazinamide (antibiotic)
      • Quinidine (antiarrhythmic)
      • D-Penicillamine (anti-inflammatory)
      • Carbamazepine (anticonvulsant)
      • Oxcarbazepine (anticonvulsant)
      • Phenytoin (anticonvulsant)
      • Propafenone (antiarrhythmic)
      • Chlorpromazine (antipsychotic)

Fever in SLE

  • Must differentiate disease activity (flare) from infection

Risk Factors for Infection [2]

  • Neutropenia/Lymphopenia
  • Hypocomplementemia
  • Immunosuppressive therapy (especially Azathioprine [3])

Studies

  • CRP: sensitivity 100%, specificity 90% >1.35mg/dL [4]
  • PCT: sensitivity 75%, specificity 75% [5]

Management

  • Inflammatory complications
    • Methylprednisolone 1-2mg/kg in most cases
  • Infectious
    • Stress dose steroids with hydrocortisone 100mg IV Q8hr if on or recently on steroids
  • Dermatologic
    • Hydrocortisone 1% cream
  • If drug induced lupus, stop medication and consider alternative

Disposition

  • Suspected new diagnosis can have out patient workup if well appearing
  • Mild flairs can have expedited out patient management
  • Musculoskeletal symptoms can usually be managed as out patients
  • Chest pain requires urgent ACS evaluation
  • Infections usually require admission for antibiotics and systemic corticosteroids

See Also

References

  1. Lisnevskaia L, et al. Systemic Lupus Erythematosus. Lancet. 2014 May 29. Epub ahead of print.
  2. Cuchacovich, R., & Gedalia, A. (2009). Pathophysiology and clinical spectrum of infections in systemic lupus erythematosus. Rheumatic diseases clinics of North America, 35(1), 75–93. doi:10.1016/j.rdc.2009.03.003
  3. Zhou, W. J., & Yang, C.-D. (2009). The causes and clinical significance of fever in systemic lupus erythematosus: a retrospective study of 487 hospitalised patients. Lupus, 18(9), 807–812. doi:10.1177/0961203309103870
  4. Kim, H.-A., Jeon, J.-Y., An, J.-M., Koh, B.-R., & Suh, C.-H. (2012). C-reactive protein is a more sensitive and specific marker for diagnosing bacterial infections in systemic lupus erythematosus compared to S100A8/A9 and procalcitonin. The Journal of rheumatology, 39(4), 728–734. doi:10.3899/jrheum.111044
  5. Scirè, C. A., Cavagna, L., Perotti, C., Bruschi, E., Caporali, R., & Montecucco, C. (2006). Diagnostic value of procalcitonin measurement in febrile patients with systemic autoimmune diseases. Clinical and experimental rheumatology, 24(2), 123–128.