Abstract
We herein report two cases of post-operative hip trauma accompanying gluteus maximus muscle injury. Both patients had painful, well-demarcated erythema with or without ulcer on the hip after surgical operations. In both cases, the serum level of CPK elevated, and magnetic resonance imaging (MRI) revealed gluteus maximus muscle injury underneath the erythema. The location of the erythema and the injured muscle were apparently unrelated to the site where pressure had been applied during and after the operation. Therefore, we assume that the post-operative hip trauma was triggered by a gluteus maximus muscle injury. We speculated that the current generated by the electric coagulator caused this gluteus muscle injury; however, the underlying mechanism requires further future study.
