[Spontaneous reactivation of hepatitis B virus in an elderly patient: a case report and review of the literature].

Reactivation of resolved hepatitis B virus (HBV) infection without any immunosuppressants has rarely been reported. Here, we describe the spontaneous HBV reactivation in a 78-year-old male patient with resolved HBV infection. Twenty-five years ago, he received interferon treatment for chronic hepatitis C.