Spiral CT Findings of Inflammatory Pseudotumor of the Liver

PURPOSE: To assess the spiral CT findings of inflammatory pseudotumor of the liver (IPTL), in order todistinguish this tumor from hepatocellular carcinoma, hepatic abscess or other space liver occupying lesions. MATERIALS AND METHODS: The spiral CT findings of IPTL were retrospectively evaluated in six patients. All caseswere confirmed by ultrasonography-guided gun biopsy. Four patients were men and two were women, and they were agedbetween 37 and 74 (mean, 49) years. The site, size, and number of IPTL were assessed, and their enhancementpatterns were evaluated during the arterial, portal and delayed phases of spiral CT. RESULTS: Five casesinvolveda solitary mass and in one there were multiple masses with surrounding small nodules. Four cases occurredin the right lobe and two in the left lobe. Four of five surrounding nodules were in the left lobe. During thearterial phase of spiral CT scanning, three layers were separated from four of five cases of solitary mass ; theywere composed of central and peripheral portions of low attenuation, and an intermediate portion ofisoattenuation. Delayed enhancement of the peripheral portion was prominent during the delayed phase. In the caseinvolving multiple masses three layers were not seen during the arterial phase, but during the delayed phaseenhancement was noted. CONCLUSION: The features of three layers, as seen on spiral CT, is considered to be veryspecific for distinguishing IPTL from other hepatic focal lesions.

Factors Related to Recurrence of Bladder Transitional Cell Carcinoma after Transurethral Resection of BladderTumor(TUR-BT)

PURPOSE: To evaluate factors related to the recurrence of TCC(transitional cell carcinoma) in the urinarybladder after transurethral resection of bladder tumor(TUR-BT). MATERIALS AND METHODS: We retrospectivelyreviewed 54 patients in whom TCC(transitional cell carcinoma) after TUR-BT had been confirmed. Recurrence wasevaluated by US, CT, cystoscopy and urine smear during the follow-up period of 6 months. The multiplicity, shape,size, and calcification of TCC, as revealed by radiologic studies, were evaluated retrospectively before TUR-BT.After TUR-BT, the histologic grade and pathologic stage of TCC were evaluated. RESULTS: According to themultiplicity of TCC, the recurrence rate was 66.7% in the multiple type and 28.6% in the single type(p=0.039) ;according to shape, this rate was 61.5% in the sessile type and 29.3% in the pedunculated type(p=0.0505), andaccording to mass size, the rate was 41.7% in tumors more than 3cm in diameter and 35.7% in tumors less than3cm(p=0.706). In the presence of calcification, the recurrence rate was 40.0% and in its absence, this rate was36.7%(p=0.885). Pathologically, the higher the grade and stage of TCC, the higher the recurrence rate(respectivelyp=0.010 and 0.041). CONCLUSIONS: Radiologically, multiple and/or sessile type TCC had a higher recurrence ratethan the single and/or pedunculated type. Pathologically, when the grade and stage of bladder tumor were higher,recurrence rates were higher.