Vasculitis comprises a spectrum of disorders defined inflammation of the blood vessel walls and is categorized based on vessel size into small-, medium-, and large-vessel vasculitis. The histological characteristics of leukocytoclastic vasculitis include neutrophil infiltration around small cutaneous blood arteries and fibrinoid necrotizing inflammation. Annular morphology is a unique and rare type of leukocytoclastic vasculitis. We report a case of annular leukocytoclastic vasculitis in a 39-year-old Saudi man who presented with scaly annular erythema and targetoid lesion configurations with prominent, raised borders. He was managed with oral prednisolone 40 mg daily as a tapered dosage regimen, in combination with topical mometasone furoate 0.1% cream applied twice daily, resulting in complete resolution of lesions. To the best of our knowledge, this is the first reported case of annular morphology of leukocytoclastic vasculitis with microvascular occlusions in the Middle East.
Aldawsari et al. (Thu,) studied this question.