Bullous Erythema Elevatum Diutinum: A Case Report.

Erythema elevatum diutinum (EED) is an uncommon, chronic form of cutaneous leukocytoclastic vasculitis that typically manifests as purplish-red to reddish-brown nodules, papules, or plaques, predominantly on the extensor surfaces. We report a rare case of bullous EED in a 67-year-old Chinese woman, whose condition included an unusual blistering presentation. The diagnosis was confirmed through histopathological examination. Upon diagnosis, the patient was treated with a combination of oral prednisone, thalidomide, and local infiltration therapy with triamcinolone acetonide, which led to significant clinical improvement. This case is noteworthy for its atypical presentation and its broader implications for the diagnosis and management of similar cases.