Leukocytoclastic Vasculitis: An Early Skin Biopsy Makes a Difference

Area of Science:

• Dermatology
• Pathology
• Rheumatology

Background:

• Leukocytoclastic vasculitis (LCV) presents a diagnostic challenge due to its uncommon nature and diverse differential diagnoses.
• While clinical evaluation and lab work are crucial, skin biopsy is typically required for definitive LCV diagnosis.
• Prompt skin biopsy, ideally within 24-48 hours of lesion onset, maximizes diagnostic yield.

Observation:

• A 60-year-old male presented with fever, headache, and a painful rash on his leg, following upper respiratory infection symptoms.
• Physical exam revealed erythematous papular rash with palpable purpura and hand edema.
• Initial laboratory tests showed elevated C-reactive protein and immunoglobulin A, but extensive workup for autoimmune and infectious causes was negative.

Findings:

• Skin biopsy performed on admission confirmed Leukocytoclastic vasculitis (LCV) without immunoglobulin A deposition.
• The patient's presentation was deemed likely secondary to a recent upper respiratory infection.

Implications:

• This case highlights the importance of timely skin biopsy in diagnosing LCV, even with preceding URI symptoms.
• Effective management with prednisone and anti-inflammatory agents resulted in symptom improvement.
• Early diagnosis and treatment are crucial for managing LCV and improving patient outcomes.