Abdominal Pseudohernia Caused by Zoster Sine Herpete

Abdominal pseudohernia is a rare clinical condition characterized by an abnormal bulging of the abdominal wall. We present a 56-year-old male patient diagnosed with abdominal pseudohernia caused by zoster sine herpete (ZSH). The patient initially presented with a right abdominal wall bulging at the Th10 dermatome area. The patient did not experience any pain or rash at the site, and the ultrasonography (US) did not reveal any tumor or hernia. Computed tomography (CT) was taken in another hospital, but it failed to provide a diagnosis. During the second visit, we performed standing ultrasonography and detected the thinning of the abdominal muscle. To diagnose abdominal pseudohernia, the key point is to detect the muscle thinning between the affected site and the healthy side.