Sacral Herpes Zoster Mimicking Pressure Ulcers and Causing Elsberg Syndrome.

A 90-year-old woman presented with sacral skin lesions that were initially misdiagnosed as pressure ulcers. A non-contrast abdominopelvic computed tomography revealed urinary retention, prompting further evaluation and leading to the diagnosis of sacral herpes zoster complicated by Elsberg syndrome. The patient was treated with antiviral therapy, and her urinary function gradually improved, with successful catheter removal by day 20.