Vasculitis: Difference between revisions

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== Differential Diagnosis ==
== Classification ==


* Small-vessel: often have palpable purpura
* Small-vessel: often have palpable purpura
** ANCA-associated
** [[ANCA-associated vasculitis]]
*** Microscopic polyangiitis: anti-MPO/p-ANCA; pulmonary-renal syndrome
*** [[Microscopic polyangiitis]]: anti-MPO/p-ANCA; pulmonary-renal syndrome
*** Granulomatosis with polyangiitis: anti-PR3/c-ANCA; pulmonary-renal syndrome
*** [[Granulomatosis with polyangiitis]]: anti-PR3/c-ANCA; pulmonary-renal syndrome
*** Eosinophilic granulomatosis with polyangiitis: more often anti-MPO; rhinosinusitis, asthma, eosinophilia, glomerulonephritis
*** [[Eosinophilic granulomatosis with polyangiitis]]: more often anti-MPO; rhinosinusitis, asthma, eosinophilia, glomerulonephritis
** Non-ANCA
** Non-ANCA
*** Immune-complex
*** Immune-complex
**** Anti-GBM disease
**** [[Anti-GBM disease]]
**** Cryoglobulinemic vasculitis: often associated with hepatitis C
**** [[Cryoglobulinemic vasculitis]]: often associated with [[hepatitis C]]
*** IgA-vasculitis (HSP): abdominal pain, arthritis, rash, sometimes IgA nephropathy
*** [[IgA vasculitis]] (HSP): abdominal pain, arthritis, rash, sometimes IgA nephropathy
*** Anti-C1q vasculitis (hypocomplementemic urticarial vasculitis
*** [[Anti-C1q vasculitis]] ([[hypocomplementemic urticarial vasculitis]])
* Medium-vessel: typically cause a lacy rash
* Medium-vessel: typically cause a lacy rash
** Polyarteritis nodosa: often associated with hepatitis B
** [[Polyarteritis nodosa]]: often associated with hepatitis B
** Kawasaki disease: usually in children, associated with mucocutaneous lymph node syndrome
** [[Kawasaki disease]]: usually in children, associated with mucocutaneous lymph node syndrome
* Large-vessel
* Large-vessel
** [[Takayasu arteritis]]: usually aortitis
** [[Takayasu arteritis]]: usually aortitis
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* Variable-vessel
* Variable-vessel
** [[Behçet syndrome]]: recurrent oral and genital ulcers with skin, eye, joint, GI, or CNS involvement
** [[Behçet syndrome]]: recurrent oral and genital ulcers with skin, eye, joint, GI, or CNS involvement
** Cogan syndrome: ocular inflammatory lesions
** [[Cogan syndrome]]: ocular inflammatory lesions
** Primary CNS vasculitis
** [[Primary CNS vasculitis]]
* Associated with a systemic disease
* Associated with a systemic disease
** Lupus
** [[Lupus]]
** Rheumatoid arthritis
** [[Rheumatoid arthritis]]
** Relapsing polychondritis
** [[Relapsing polychondritis]]
** Etc.
** Etc.


== Clinical Presentation ==
== Clinical Manifestations ==


=== History ===
=== History ===
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== Investigations ==
== Investigations ==


* ** ANA: lupus and other rheumatologic diseases
* ANA: lupus and other rheumatologic diseases
* Complements: lupus and mixed cryoglobulinemia
* Complements: lupus and mixed cryoglobulinemia
* ANCA: for ANCA-associated vasculitis
* ANCA: for ANCA-associated vasculitis

Latest revision as of 13:02, 8 September 2022

Classification

Clinical Manifestations

History

  • Fever, fatigue, weight loss, arthralgias
  • Scleritis
  • Nasal crusting, epistaxis, or upper airway disease: GPA
  • Acute foot or wrist drop
  • Limb claudication, especially unusual patient or location: Takayasu or giant cell arteritis
  • Hemoptysis: ANCA-associated vasculitis
  • Glomerulonephritis: ANCA-associated vasculitis or anti-GBM disease
  • Drug exposure in past 6-12 months
    • Cocaine/Levamasole
    • Hydralazine
    • Propylthiouracil (PTU) more than methimazole (MMI)
    • Minocycline
    • Allopurinol, penicillamine, procainamide, thiamazole, clozapine, phenytoin, rifampicin, cefotaxime, isoniazid, indomethacin
  • Hepatitis B or C
  • Lupus or other rheumatologic diseases

Physical exam

  • Mononeuritis multiplex: sensory or motor neuropathy, which can be subtle, and symmetric or asymmetric
  • Palpable purpura: small-vessel
  • Diminished peripheral pulses: large-vessel vasculitis

Investigations

  • ANA: lupus and other rheumatologic diseases
  • Complements: lupus and mixed cryoglobulinemia
  • ANCA: for ANCA-associated vasculitis
  • CXR if respiratory symptoms
  • EMG if concern for mononeuritis multiplex
  • Lumbar puncture if concern for primary CNS vasculitis