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Image Number 423 (Urticarial vasculitis)

 
Morphology:
Red,nonscaly

Diagnosis: Urticarial vasculitis

Site: Hand,palm

Sex: M

Age: 14

Type: Clinical

Description: Painful red non blanching plaques

Submitted by: Shahbaz Janjua

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Differential Diagnosis

History:

Urticarial vasculitis (UV) is an eruption of erythematous wheals that clinically resembles urticaria but is a form of leukocytoclastic vasculitis.   UV plaques persist for 24 to 72 hours and may depict residual purpuric hues, scaling, and hyperpigmentation. Lesions are typically painful or burning rather than pruritic.  UV is divided into two disease types termed normocomplementemic and hypocomplementemic. Both types can be associated with systemic symptoms (eg, angioedema, arthralgias, abdominal or chest pain, fever, pulmonary disease, renal disease, episcleritis, uveitis). The hypocomplementemic form more often is associated with systemic symptoms and has been linked to connective tissue disease (ie, systemic lupus erythematosus [SLE]).  Direct immunofluorescence may reveal immunoglobulin and complement deposition in and around the blood vessel. UV should be suspected when individual painful hives persist for more than 24 hours or lead to pigmentation or show purpuric appearance. Poor response to antihistamines and features of systemic inflammation are also supportive.  Urticarial vasculitis tends to run a chronic courseAntihistamines or nonsteroidal anti-inflammatory drugs (NSAIDs) may provide symptomatic relief in patients with only cutaneous involvement  . If these agents do not work, colchicine, hydroxychloroquine, or dapsone may be prescribed.   If all other treatment modalities have failed or if the patient has systemic involvement,  systemic glucocorticoids may be advised.   Steroid sparing agents like azathioprine may be added.

International Teledermatology Blog  on this case.



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