Liver Transplantation for Porto-sinusoidal Vascular Liver Disorder: Long-term Outcome

BACKGROUND

Porto-sinusoidal vascular liver disorder (PSVD) is a rare disease that occasionally requires liver transplantation (LT), despite usually presenting preserved liver function. There remains a paucity of data pertaining to LT in PSVD. The aim was to identify features associated with post-LT outcomes in PSVD.

METHODS

Retrospective multicentre study of 79 patients who received LT for PSVD.

RESULTS

Median post-LT follow-up was 37 (range 1-261) mo. Refractory ascites 24 (30%), hepatic encephalopathy 16 (20%), and hepatopulmonary syndrome 13 (16.3%) were the most frequent indications for LT. Hepatocellular carcinoma was the indication in only 2 patients. Twenty-four patients died, 7 due to liver and 17 to non-liver related causes. Post-LT survival was 82.2%, 80.7%, and 68.6% at 1, 2, and 5 y, respectively. Post-LT survival was significantly better in patients without (n = 58) than in those with a persistent severe PSVD-associated condition (n = 21). Pre-LT hyperbilirubinemia levels and creatinine >100 µmol/L were also independently associated with poor survival. Six patients (7.6%) required a second LT. Recurrence of PSVD was confirmed by liver biopsy in only 1 patient and in 3 further patients it was likely.

CONCLUSIONS

LT in PSVD is associated with an acceptable outcome in the absence of associated severe conditions. However, persistence of a severe associated condition, pre-LT high bilirubin levels, or creatinine >100 µmol/L impact outcome, and these are features that should be considered when evaluating PSVD patients for LT. PSVD recurrence is possible after LT and needs to be explored, at least, in cases of posttransplant portal hypertension.

Effects of All-Oral Anti-Viral Therapy on HVPG and Systemic Hemodynamics in Patients With Hepatitis C Virus-Associated Cirrhosis

BACKGROUND & AIMS

Patients with hepatitis C virus-associated cirrhosis and clinical significant portal hypertension (CSPH, hepatic venous pressure gradient [HVPG] 10 mmHg or greater), despite achieving sustained virological response (SVR) to therapy, remain at risk of liver decompensation. We investigated hemodynamic changes following SVR in patients with CSPH and whether liver stiffness measurements (LSMs) can rule out the presence of CSPH.

METHODS

We performed a multicenter prospective study of 226 patients with hepatitis C virus-associated cirrhosis and CSPH who had SVR to interferon-free therapy at 6 Liver Units in Spain. The portal pressure gradient was determined based on HVPG at baseline and 24 weeks after therapy; patients also underwent right-heart catheterization and LSM at these time points. Primary outcomes were effects of SVR on the hepatic, pulmonary, and systemic hemodynamics; factors related to HVPG ≥10% reduction and to CSPH persistence; and whether LSMs can rule out the presence of CSPH after SVR.

RESULTS

Most patients (75%) had esophageal varices, 21% were Child-B, and 29% had at least 1 previous episode of liver decompensation. Overall, HVPG decreased from 15 (IQR: 12-18) before treatment to 13 (10-16) mmHg after SVR (reduction of 2.1 ± 3.2 mmHg; P < .01). However, CSPH persisted in 78% of patients. HVPG decreased by 10% or more from baseline in 140 patients (62%). Baseline level of albumin below 3.5 g/dL was the only negative factor associated with an HVPG reduction of 10% or more. LSM decreased from 27 (20-37) kPa before treatment to 18 (14-28) kPa after SVR (P < .05). One third of patients with a reduction in LSM to below 13.6 kPa after SVR still had CSPH. A higher baseline HVPG and a lower decrease in LSM after treatment were associated with persistence of CSPH after SVR. Systemic hemodynamics improved after SVR. Interestingly, pulmonary hypertension was present in 13 patients at baseline and 25 after SVR, although only 3 patients had increased pulmonary resistance.

CONCLUSIONS

In a multicenter prospective study of patients with hepatitis C virus-associated cirrhosis, an SVR to all-oral therapy significantly reduced HVPG, compared with before treatment. Nevertheless, CSPH persists in most patients despite SVR, indicating persistent risk of decompensation. In this population, changes in LSM do not correlate with HVPG and cut-off values are not reliable in ruling out CSPH after SVR.