case_images: PMC11729731_01
case_images: Axial (a) and coronal (b) views of a CT scan showing a destroyed right kidney (red star) with disappearance of the pyelocaliceal cavities (pyonephrosis) and perirenal phlegmon extending to the psoas muscle (blue star), the paravertebral muscles (green star) and the muscles of the posterior abdominal wall through the intercostal spaces (orange star). For comparison, the yellow arrow represents the non-infiltrated contralateral left side (kidney and psoas muscle).
case_images: acmi-7-00911-g001.jpg
case_images: PMC11729731_01_acmi-7-00911-g001.jpg
case_images: F1
case_images: An abdominal-pelvic computed tomography (CT) scan without and with contrast (Fig. 1) showed findings consistent with right pyeloureteritis complicated by pyonephrosis and a significant perirenal phlegmon infiltrating the homolateral psoas muscle with two abscesses within the muscles of the posterior abdominal wall and right paravertebral muscles.