Relapsing annular lesions: a diagnostic challenge

We present a case of a 60-year-old patient who had several flares of nonscaling, erythematous, urticarial annular skin lesions on her abdomen, buttocks and proximal extremities, possibly related to COVID-19 vaccination. Skin biopsy and histopathological examination revealed a dense perivascular and interstitial inflammatory infiltrate involving the upper and mid dermis composed of lymphocytes and abundant eosinophils. Degranulation of eosinophils with occasional flame figures was also observed.