33 year old male with buttock abscess and tenderness to palpation. Evaluate for perirectal abscess. ABDOMEN:This examination is limited by absence of IV contrast. LUNG BASES: No significant abnormality notedLIVER, BILIARY TRACT: No significant abnormality notedSPLEEN: No significant abnormality notedPANCREAS: No significant abnormality notedADRENAL GLANDS: No significant abnormality notedKIDNEYS, URETERS: No significant abnormality notedRETROPERITONEUM, LYMPH NODES: No significant abnormality noted.BOWEL, MESENTERY: No significant abnormality noted.BONES, SOFT TISSUES: No significant abnormality notedOTHER: No significant abnormality notedPELVIS:PROSTATE, SEMINAL VESICLES: No significant abnormality notedBLADDER: No significant abnormality notedLYMPH NODES: No significant abnormality notedBOWEL, MESENTERY: No significant abnormality notedBONES, SOFT TISSUES: No significant abnormality notedOTHER: There is extensive diffuse soft tissue thickening subcutaneously in the right medial buttock that extends to the anus. The enteric contrast has not reached the distal colon and rectum. Without IV and enteric contrast, it is difficult to define an abscess or fistula. No definite abscess was found. No intrapelvic extension. If this condition persists or further evaluation is required, a non-contrast MRI scan may be most helpful.There is diffuse vascular calcifications in the pelvis.
Right buttock subcutaneous inflammatory changes, but no definite abscess. Sensitivity is limited without enteric or IV contrast. Consider MRI if further evaluation is required. 