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Fig. 1F —62-year-old man with presacral abscess secondary to anastomotic leakage after resection of invasive rectal adenocarcinoma who was referred for abscess drainage. Final confirmation sagittal (F) and axial (G) true FISP images of drainage catheter in place show catheter shaft (arrowheads) extending through rectum and within air component of abscess cavity. Pigtail end (arrows) has been locked in dependent portion of fluid component.