Chronic active varicella zoster virus infection

This case report illustrates previously undescribed features of chronic active varicella zoster virus (VZV) infection, including a 4-month delay between the onset of zoster and zoster sine herpete, involvement of 9 dermatomes on progression of zoster to zoster sine herpete, and the presence of both VZV DNA and anti-VZV immunoglobulin G (IgG) in the CSF.