Annular erythema as a cutaneous sign of recurrent ductal breast carcinoma, misdiagnosed as erythema chronicum migrans.

Annular erythema as a clinical manifestation of locoregional recurrence of breast cancer is extremely rare. Only three papers with the description of five cases have been published in the current literature to our knowledge. Herein, we describe two additional cases of annular erythema as a cutaneous sign of recurrent ductal breast carcinoma; both were misdiagnosed as erythema chronicum migrans.