Faculty Bibliography

PURPOSE: To present the transsplenic route as an alternative approach for portal vein recanalization-transjugular portosystemic shunt (PVR-TIPS) for chronic main portal vein thrombosis (PVT) in potential transplant candidates. MATERIALS AND METHODS: In 2013-2014, 11 consecutive patients with cirrhosis-induced chronic main PVT underwent transsplenic PVR-TIPS. All patients had been denied listing for transplant because of the presence of main PVT, a relative contraindication in this center. The patients were followed for adverse events. Portal vein patency was assessed at 1 month by splenoportography and every 3 months subsequently by ultrasound or magnetic resonance imaging. After PVR-TIPS, patients were reviewed (and subsequently listed for transplant) at a weekly multidisciplinary conference. RESULTS: PVR-TIPS using the transsplenic approach was successful in all 11 patients with no major complications. Median age was 61 years (range, 33-67 y) and 9 of 11 patients (82%) were men. Nonalcoholic steatohepatitis was the leading cause of liver disease in 4 of 11 patients (36%), and hepatitis C was present in 4 of 11 patients (36%). Complete main PVT was found in 8 of 11 patients (73%). Of 11 patients, 4 (36%) had a Model for End-Stage Liver Disease score > 18, and 8 (73%) had a baseline Child-Pugh score of 7-10. Minor adverse events occurred in 2 of 11 patients (fever, encephalopathy). At the end of the procedure, 5 of 11 patients (45%) exhibited some minor remaining thrombus in the portal vein; 3 of the 5 patients (60%) had complete thrombus resolution at 1 month, with the remaining 2 patients having resolution at 3 months (no anticoagulation was needed). Three patients underwent successful liver transplant with end-to-end anastomoses. CONCLUSIONS: Transsplenic PVR-TIPS is a potentially safe and effective method to treat PVT and improve transplant candidacy.

BACKGROUND: Chronic, obliterative portal vein (PV) thrombosis (PVT) represents a relative contraindication to liver transplantation (LT) in some centers. When PV thromboembolectomy is not feasible, alternative techniques (portacaval hemitransposition, portal arterialization, multivisceral transplantation) are associated with suboptimal outcomes. In cases where a chronically thrombosed PV has become obliterated, we developed PV recanalization (PVR)-transjugular intrahepatic portosystemic shunt (TIPS) to potentiate LT. We evaluated the impact of PVR-TIPS on liver function, transplant eligibility, and long-term outcomes after LT. METHODS: Forty-four patients with chronic obliterative main PVT were identified during our institutional LT selection committee. After joint imaging review by transplant surgery/radiology, these patients underwent PVR-TIPS to potentiate transplant eligibility. Patients were followed by hepatology/transplant until LT, and ultimately in posttransplant clinic. The TIPS venography and serial ultrasound/MRI were used subsequently to document PV patency. RESULTS: The main PV (MPV) was completely thrombosed in 17 of 44 (39%) patients; near complete (>95%) occlusion was noted in 27 of 44 (61%) patients. Direct transhepatic and transsplenic punctures were required in 11 of 43 (26%) and 3 of 43 (7%) cases, respectively. Technical success was 43 of 44 (98%) cases. At PVR-TIPS completion, persistence of MPV thrombus was noted in 33 of 43 (77%) cases. One-month TIPS venography demonstrated complete resolution of MPV thrombosis in 22 of 29 (76%) without anticoagulation. Thirty-six patients were listed for transplantation; 18 (50%) have been transplanted. Eighty-nine percent MPV patency rate and 82% survival were achieved at 5 years. CONCLUSIONS: The PVR-TIPS may be considered for patients with obliterative PVT who are otherwise appropriate candidates for LT. The high rate of MPV patency post-TIPS placement suggests flow reestablishment as the dominant mechanism of thrombus resolution.

Transarterial therapies in the setting of primary and secondary liver malignancies are becoming an essential part of the oncology landscape. Most patients with hepatic malignancies are not candidates for curative surgical intervention, thereby warranting exploration of alternative means of treatment that preserves quality of life while providing clinical benefit. Herein, the data for intra-arterial chemoinfusion, transarterial chemoembolization, drug-eluting beads, and radioembolization are discussed in the setting of malignancies within the liver; outcome data relating to survival, time-to-progression, time-to-recurrence, and adverse events are presented. Further data regarding different treatment paradigms for hepatocellular carcinoma, metastatic colorectal carcinoma, neuroendocrine tumours, and intrahepatic cholangiocarcinoma are also provided. In light of these and forthcoming data, transarterial therapies seem to offer a viable treatment pathway for select populations of patients.

UNLABELLED: Resection and radiofrequency ablation (RFA) are treatment options for hepatocellular carcinoma (HCC) <3 cm; there is interest in expanding the role of ablation to 3-5 cm. RFA is considered high-risk when the lesion is in close proximity to critical structures. Combining microcatheter technology and the localized emission properties of Y90, highly selective radioembolization is a possible alternative to RFA in such cases. We assessed the efficacy (response, radiology-pathology correlation, survival) of radiation segmentectomy in solitary HCC not amenable to RFA or resection. Patients with treatment-naive, unresectable, solitary HCC