Background: It is widely known that cytomegalovirus (CMV) primarily brings about subclinical and asymptomatic infection in the early stages of life and can cause various dermatological and systemic disorders under immunosuppressed conditions. Nonimmunosuppressed individuals very rarely present with cutaneous CMV involvement. Objective: In the present study, we described the clinical characteristics of 5 nonimmunosuppressed adult patients with positive IgM antibody to CMV. Methods: The systemic symptoms and dermatological features of these 5 patients were described. Laboratory examinations including blood cell counts, liver and renal functions were performed. IgG and IgM antibodies to CMV were also examined at the first consultation and 2–3 months after the skin eruption. Polymerase chain reaction for CMV DNA was performed in the skin samples of the patients. Results: All 5 patients had fever and complained of a sore throat. Multiple exudative erythema and target lesions with itching were observed mainly on the extremities. These symptoms and eruptions disappeared within 1 week after the onset and IgM antibody titers significantly decreased after 2–3 months. IgG antibody to CMV was already positive in 3 cases but was negative in 2 cases at the initial consultation. Conclusion: We propose that CMV infection may cause erythema multiforme by primary, recurrent infections or reactivation of CMV even in nonimmunosuppressed adults.

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