# Liver transplantation in patients with history of extra-hepatic malignancies

## TL;DR

This study examines liver transplant outcomes in patients with a history of extra-hepatic cancer, finding no significant difference in survival but noting that cancer recurrence after transplant is linked to worse outcomes.

## Contribution

The study provides novel data on liver transplantation in patients with pre-transplant extra-hepatic malignancies, addressing a gap in existing literature.

## Key findings

- Patients with a history of extra-hepatic malignancies had similar post-transplant survival compared to those without.
- Cancer recurrence after liver transplant was strongly associated with worse survival outcomes.
- A short interval (less than 2 years) between cancer diagnosis and transplant did not affect survival.

## Abstract

Increasing use of solid organ transplantation [SOT] has coincided with increasing cancer survivorship. Consensus statements exist for SOT in patients with pre-transplant malignancy [PTM]. Yet, most outcomes have been reported in heart and kidney transplant. This paper addresses the shortage of information on liver transplant [LT] in patients with PTM.

A retrospective case-control study was conducted of patients who underwent LT between 1/1/2008–5/31/2024 at an American transplant center. Patients were stratified according to history of extrahepatic PTM, time from PTM to LT, and post-LT PTM recurrence. Primary outcomes were overall survival [OS] and time to recurrence.

1,876 patients underwent LT. 143(7.62%) had an extrahepatic PTM pre-LT. PTM patients were older and had lower MELD at LT. There was no significant difference in post-LT survival (p = 0.293) between patients who did and did not have PTM. Of 121 patients with known time from PTM to LT, 19(15.7%) had an interval less than 2 years. When stratifying by 2-year interval from PTM to LT, there was no difference in survival (p = 0.34). Post-LT, 20 patients (14.0%) had recurrence of their PTM. The average time to recurrence was 595.5 days. When treated as a time-dependent co-variate, recurrence was a strong predictor of worse post-LT survival (HR 10.9, 95% CI 4.32–27.7, p < 0.001).

In our experience, a history of pre-LT PTM, including with an interval to LT of less than 2 years, was not associated with worse post-LT survival. Recurrence of PTM did portend worse prognosis.