Role of imaging in the assessment of intraabdominal abscess

Role of imaging in the assessment of intraabdominal abscess

US: US is best suited for evaluating pelvic and right and left upper quadrant abscesses, where the bladder, liver, and spleen provide acoustic windows for sound transmission. Abscesses vary in appearance but commonly are irregularly marginated and hypoechoic, with internal areas of increased echogenicity.

MDCT: CT is the first choice for detecting abscess in acutely ill patients. The CT appearance of an abscess depends on its maturity. Initially, an abscess may appear as a soft-tissue density mass. As it matures and undergoes liquefactive necrosis, the central region develops a near-water attenuation, possibly with internal air bubbles or an air-fluid level. The abscess wall typically enhances, increased density in the adjacent fat is common, and mass effect on the surrounding structures may be seen.

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