This case report illustrates how erythema annulare centrifugum may manifest as a reaction pattern induced by molluscum contagiosum.
Erythema annulare centrifugum (EAC), whether as a distinctive entity or a reaction pattern, manifests characteristic clinical and histopathologic features. It has been associated with infectious agents, particularly dermatophytes, other fungi (eg, Candida species, Penicillium species), bacteria (eg, Mycobacteria species, Streptococcus species, Escherichia coli), viruses (eg, poxvirus, Epstein-Barr virus, varicella-zoster virus, human immunodeficiency virus), and parasites. Less commonly, EAC has been linked to drugs, connective-tissue disease, sarcoidosis, hypereosinophilic syndrome, and pregnancy. However, many of these associations are likely coincidental, and in most cases, no underlying cause is identified. Herein, we report a case of EAC caused by molluscum contagiosum.