Department of Radiology, St.Vincent's Hospital, The Catholic University of Korea, 93-6 Chi-dong, Paldal-gu, Suwon 442-723, Korea. leesoolbee@paran.com
Published online: June 1, 2006.
ABSTRACT
A 25-year-old woman presented with abdominal discomfort and weight loss. Sonography demonstrated a well-defined, anechoic, cystic mass with posterior acoustic enhancement, internal thin septations, and a peripheral hypoechoic solid portion that had no increased blood flow on Doppler ultrasound. Contrast-enhanced CT revealed a cystic omental mass with internal thin septations and an enhancing solid portion which appeared as the hypoechoic solid portion on ultrasonography. A pathologic specimen demonstrated a pseudocyst containing serous fluid with gelatinous material. The solid component at the peripheral portion of the pseudocyst indicated caseous necrosis with multinucleated giant cells. This histologic finding was consistent with tuberculosis and supported the final diagnosis of omental pseudocyst caused by tuberculous peritonitis. Therefore, intraperitoneal pseudocyst with tuberculosis should be considered in the differential diagnosis of an intraperitoneal cystic mass in a young adult.
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