1297: detection of recurrent lesions in hcc patients treated with radiofrequency ablation (rfa): a...

S180 Ultrasound in Medicine and Biology Volume 35, Number 8S, 2009

Results: There were 4 types of enhancement patterns observed inthe 113 lesions on CEUS. Type I, 49 (43.4%) nodules demonstratedsimultaneous enhancement with the liver parenchyma and, there-fore, the nodules appeared isoechoic to the liver throughout thearterial, portal and parenchymal phases; Type II, 27 (23.9%) nod-ules demonstrated delayed enhancement in the portal phase and thenbecame isoechoic to the liver in parenchymal phase; Type III, 28(24.8%) nodules presented delayed or simultaneous enhancementwith the liver and then slight wash-out causing a hypoechoic ap-pearance in the parenchymal phase; Type IV, 9 (8.0%) nodulespresented slight enhancement with hyperechoic during arterialphase and slight wash-out with hypoechoic to the liver during theparenchymal phase. The ratio of hepatocellular dysplasia were sig-nificantly higher in type III/IV enhancement patterns than in typeI/II (P�0.05). There were no significant statistical differences inhepatocellular regeneration, degeneration, necrosis, fibrous tissuehyperplasia, inflammatory cellular infiltration between type III/IVand type I/II enhancement patterns (P�0.05).Conclusions: The analysis of hemodynamics and the degree of hepa-tocellular atypia of RNs can help to monitor the development of RNs,and CEUS is useful in the clinical practice for the study of nodularlesions in cirrhotic patients.Key Words: Ultrasonography; Contrast agent; Cirrhosis; Regenerativenodule

1295

Portal Hyperperfusion in Living Donor Liver TransplantationYu Fan Cheng, Chang Gung Memorial Hospital, Taiwan

Portal hyperperfusion in a small-size liver graft is one cause of posttrans-plant graft dysfunction. We retrospectively analyzed the potential riskfactors predicting the development of portal hyperperfusion in 43 adultliving donor liver transplantation recipients. The following were evaluated:age, body weight, native liver disease, spleen size, graft size, graft-to-recipient weight ratio (GRWR), total portal flow, recipient portal venousflow per 100 g graft weight (RPVF), graft-torecipient spleen size ratio(GRSSR) and portosystemic shunting. Spleen size was directly propor-tional to the total portal flow (p�0.001) and RPVF (p�0.014). Grafthyperperfusion (RPVF flow �250 mL/min/ 100 g graft) was seen in eightrecipients. If the GRSSR was �0.6, 5 of 11 cases were found to have grafthyperperfusion (p � 0.017). The presence of portosystemic shunting wassignificant in decreasing excessive RPVF (p � 0.059). A decrease in portalflow in the hyperperfused grafts was achieved by intraoperative splenicartery ligation or splenectomy. Spleen size is a major factor contributing toportal flow after transplant. The GRSSR is associated with posttransplantgraft hyperperfusion at a ratio of �0.6.

1296

Doppler Ultrasound of the Venous Graft (Middle Hepatic Vein)in Adult Living Donor Liver TransplantationYu Fan Cheng, Chang Gung Memorial Hospital, TaiwanT L Huang, Kaohsiung Medical Center, Taiwan

Objective: To assess the patency of the reconstructed middle hepaticvein (MHV) with cryopreserved vein graft in adult living Donor livertransplantation (LDLT)Materials and Methods: From 2006 to 2008 Mar, there were 46adult LDLT cases included with the MHV reconstructed by cryo-preserved vein grafts. The branches drained segment 5 (V5) and/orsegment 8 (V8) were reconstructed by size � 5 mm. Color Dopplerultrasound (CDUS) was performed to make sure of patency imme-diately after reperfusion of the graft. If no flow or poor flow velocityand /or monophasic waveform was abnormal, readjust of venous

CDUS were also performed during the 1st week of postoperativedays. Postoperative enhanced CT studies were performed on casesof hyperbilirubinemiaResults: The MHV vein grafts reconstructed were including 15 V5s, 18V8s and 13 of V5 �V8 in one anastomosis. CDUS had detected normaloutflow in 52% (24/46), poor flow velocity (�10cm/sec) or flat wave-form in 37% (17/46) and no flow in 11% (5/46). Postoperative com-plications with marked ascites, pleural effusion and/or persisted hyper-bilirubinemia were noted in 7 cases including 3 cases of marginalgraft-recipient weight ratio (�1.0). CT scans was performed for com-plications with significant venous congestion.Conclusion: Poor outflow of the reconstructed MHV graft detected byCDUS is significant to the graft dysfunction. CDUS is the best modalityfor evaluation of the outflow patency during and post LDLT.

1297

Detection of Recurrent Lesions in HCC Patients Treated withRadiofrequency Ablation (RFA): A Comparison of ContrastEnhanced Ultrasonography with CTYing Dai, Beijing Cancer Hospital & Institute, China

Objective: To investigate the diagnostic value of ultrasonographycombined with contrast enhanced ultrasonography (CEUS) in detectionof recurrent lesions in HCC patients treated with radiofrequency abla-tion (RFA) compared with Compute Tomography (CT).Methods: One hundred and seventy-three patients with HCC treatedwith curative RFA were enrolled in this study. All patients receivedboth CEUS with SonoVue and CT at regular intervals. Nodules withcontrast enhancement during the arterial phase (hypervascular) onCEUS were diagnosed as malignant. Biopsy and pathological confir-mation or enlargement during follow-up were regarded to be thereference standard.Results: Altogether 102 hypervascular nodules were detected in 50patients. Of them, 102 nodules in 41 patients were confirmed asmalignant. The other nodules were confirmed as benign including 14regenerative nodules, 3 abnormal perfusion, 2 vascular malformation, 1hemangioma and 1 vessel cross-section. The sensitivity, specificity andaccuracy rate for CEUS in the detection of recurrent nodules were85.2% (69/81), 38.1% (8/21) and 75.5% (77/102). The sensitivity,specificity and accuracy rate for CT were 85.2% (69/81), 80.1% (17/21)and 84.3% (86/102). There was no statistical significance between thetwo method (X2�2.473, P�0.116).Conclusion: CEUS was helpful to detect recurrent nodules in HCCpatients treated with RFA, comparable with CT.Keywords: contrast enhanced ultrasonography; hepatocellular carci-noma, radiofrequency ablation, recurrence

1298

Additional Application of Interferon-Apha After CompleteDestruction (CD) of Hepatocellular Carcinoma (HCC): Influenceon Local Tumor Progression (LTP)Jordan G Genov, Clinic of Gastroenterology, University Hospital“Queen Joanna”, BulgariaNikola G Grigorov, Clinic of Gastroenterology, University Hospital“Queen Joanna”, BulgariaRumiana G Mitova, Clinic of Gastroenterology, University Hospital“Queen Joanna”, BulgariaBranimir S Golemanov, Clinic of Gastroenterology, UniversityHospital “Queen Joanna”, BulgariaLjudmil R Dinkov, Clinic of Gastroenterology, University Hospital“Queen Joanna”, BulgariaMarin P Donov, Clinic of Gastroenterology, University Hospital