Leukocytoclastic Vasculitis: Statement Analysis
The correct statements are (c), (d), and (e). Let me break down each statement systematically:
Statement-by-Statement Analysis
a) "Never accompanied by fever and malaise" - INCORRECT
This is definitively false. Systemic manifestations are common in leukocytoclastic vasculitis, with fever occurring in approximately 33% of patients and malaise in 18% 1. In a review of 51 histologically confirmed cases, systemic manifestations occurred in 63% of patients, with fever being the most frequent systemic finding 1. The presence of constitutional symptoms does not exclude LCV and may actually indicate more extensive disease involvement.
b) "Lesions typically begin on the upper extremities" - INCORRECT
Leukocytoclastic vasculitis characteristically presents with palpable purpura predominantly affecting the lower extremities 2, 3. The lower legs are the classic distribution site, with palpable purpura found in approximately 80% of cases 1. This gravitational distribution pattern is a key clinical feature that helps distinguish LCV from other dermatologic conditions 4.
c) "Duration of disease is usually 1-4 months" - CORRECT
The natural course of LCV varies but typically follows a time-limited pattern. In documented case series, the disease course was acute in 49% of cases, recurrent in 27%, and chronic in 20% 1. When a medication is the causative agent, the prognosis is favorable and discontinuation of the culprit drug is usually resolutive, with resolution typically occurring within weeks to months 2. The 1-4 month timeframe aligns with the acute to subacute course observed in the majority of cases.
d) "Diagnostic criteria include polymorphonuclear perivascular infiltration" - CORRECT
This is the histopathologic hallmark of leukocytoclastic vasculitis. The diagnosis relies on histopathological examination showing an inflammatory infiltrate composed of neutrophils (polymorphonuclear cells) with fibrinoid necrosis and disintegration of nuclei into fragments, termed "leukocytoclasia" 2. The polymorphonuclear infiltrate with nuclear dust is the defining microscopic feature that confirms the diagnosis 3, 1.
e) "Can occur in HBV infection" - CORRECT
Hepatitis B virus infection is a recognized cause of vasculitis, specifically hepatitis B-associated polyarteritis nodosa (PAN). The EULAR guidelines explicitly address hepatitis B-associated PAN as part of the spectrum of viral-associated vasculitides 5. While HBV more classically causes medium-vessel vasculitis (PAN), the histopathologic pattern of leukocytoclastic vasculitis can be seen in the context of HBV infection. Additionally, serological testing for hepatitis B virus is part of the standard workup for LCV 2.
Clinical Pearls
Common pitfalls to avoid:
- Do not assume absence of systemic symptoms rules out LCV
- Do not expect upper extremity predominance—this should prompt consideration of alternative diagnoses
- Remember that infections (including viral hepatitis), medications, and autoimmune diseases are the most common identifiable causes, found in approximately 73% of cases 1
Essential diagnostic workup includes: