Objective: To analyze risk factors for systemic involvement and long-term course in leukocytoclastic vasculitis.
Design: A clinicopathological study of 160 patients with leukocytoclastic vasculitis followed up for at least 3 years. Univariate and multivariate analysis were conducted by logistic regression methods.
Setting: The Bellvitge Hospital, a referral center in Barcelona, Spain.
Patients: One hundred sixty patients with cutaneous leukocytoclastic vasculitis. Patients in the categories cutaneous/systemic vasculitis and acute/chronic cutaneous vasculitis were selected for comparative analysis.
Main outcome measures: Clinical, laboratory, and histopathological findings.
Results: Of 89 females and 71 males, aged 14 to 89 years, systemic involvement was documented in 20% of cases. Perinuclear-staining antineutrophil cytoplasmic autoantibodies were found in 21% of patients and cryoglobulins in 25.4%. Of the patients, 1.9% died of systemic vasculitis. The average duration of cutaneous lesions was 27.9 months. In 67.2%, a cause or associated condition was identified. Of the skin specimens, 59.6% showed vasculitis limited to superficial dermal vessels. Direct immunofluorescence was positive in 84.3% of cases. In the multivariate analysis, paresthesia, fever, and absence of painful lesions were found to be risk factors for systemic involvement. Cryoglobulins, arthralgia, and normal temperature were risk factors for chronic cutaneous disease.
Conclusion: Our results identify prognostic factors in leukocytoclastic vasculitis and may provide some aid in the management of this heterogeneous group of patients.