Point-of-care ultrasound for the early diagnosis of emphysematous pyelonephritis: A case report and literature review

Figure 2 Comparison of computed tomography scans of the right kidney. A: Image on day 3 after symptom onset showing gas bubbles (orange oblique arrow) in the right perirenal space and an enlarged kidney with perinephric fat stranding (PFS) (white oblique arrow); B: Image on day 7 after symptom onset showing gas bubbles plus an abscess in the right perirenal space (orange oblique arrow) and a more enlarged kidney with more PFS (white oblique arrow); C: Image on day 9 after symptom onset showing a pig-tail catheter (orange oblique arrow) in the right perirenal space and an enlarged kidney with PFS (white oblique arrow); D: Image on day 11 after symptom onset showing a pig-tail catheter (orange oblique arrow) in the right perirenal space and a normal-size kidney with clear perinephric fat (white oblique arrow).