An area within the posterior thigh muscles that was clearly hypoechoic compared to the unaffected leg appeared in view. The superficial soft tissue appeared to be largely unaffected. The muscle became increasingly hypoechoic as we scanned proximal in the thigh. The affected muscle was larger in size compared to the unaffected leg and a discrete anechoic region was found with irregular borders. Dr. Michael Schick @UltrasoundStuff - UC Davis Emergency Medicine #Clinical #MSK #POCUS #Thigh #Transverse #Pyomyositis #SonoStuff