Herpes zoster. This patient has grouped vesicles on an erythematous base.
Herpes zoster. Unilateral S1 and S2 distribution.
Read about Herpes Zoster in Context:
Current Diagnosis and Treatment: Geriatrics, 2e: Chapter 49. Common Skin Disorders
Read about Varicella Zoster:
Harrison’s Principles of Internal Medicine, 20e: Chapter 188. Varicella-Zoster Virus Infections
The Color Atlas and Synopsis of Family Medicine, 3e: Chapter 129. Chickenpox
Hazzard’s Geriatric Medicine and Gerontology, 7e: Chapter 3. Immunology of Aging