Long-term outcome of liver transplantation for unresectable liver metastases from neuroendocrine neoplasms: a Belgian retrospective multi-centre study

peer reviewedBackground: Liver transplantation (LT) is the only curative treatment for unresectable liver metastases from neuroendocrine neoplasms (NEN-Liver-Mets). While recurrence is frequent after LT, there is limited data available in the literature on the outcome of recurrent patients. Methods: We retrospectively reviewed the medical records of all patients who underwent LT by NEN-Mets at the six LT centres in Belgium from 1986 to 2020. Patient and tumour characteristics, indication for transplantation, overall survival (OS), disease-free survival (DFS), and tumour recurrence and outcomes were analysed. Results: Forty patients underwent a LT for NEN-Liver-Mets in Belgium. Twenty-nine patients were male (74.2%) with a mean age of 41.9 and 47.1 years at the time of NEN diagnosis and LT, respectively. WHO classification was available for 32 patients and changed over time (see table below). OS post-LT at 1-, 5-, and 10-years are: 84,3%, 65,0% and 54,6% respectively, while the overall DFS are: 76.3%, 44.5% and 38.2% in the same intervals. Patients transplanted after 2010 showed better OS at 5-and 10-years (74.8% and 74.8%) when compared with patients transplanted before (60,0% and 49.5%). Twenty patients (50%) presented a NEN recurrence, of this, 14 (70%) were transplanted before 2010 and only 6 (30%) were transplanted afterwards (p=0.03). The median time for recurrence diagnosis was 12.3 months (range: 5.1 to 69.2). The most frequent recurrence treatments were surgical resection, somatostatin analogs, chemotherapy, and sunitinib therapy (8, 6, 6, and 4 patients, respectively). Survival rates were 89.5% and 56.1% at 1- and 5-years after recurrence diagnosis.Conclusions: Patients transplanted for unresectable NEN-Liver metastases had good long-term survival. Although the total recurrence rate is high, it decreased dramatically after 2010, probably due to better patient selection. Furthermore, recurrence treatment should be recommended as it may prolong patient survival

Liver transplantation and vascular tumours.

Summary Based on analysis of the literature and of the audited ELITA (European Liver Intestinal Transplant Association)-ELTR (European Liver Transplant Registry) data, the place of liver transplantation (LT) in the treatment of vascular tumours is discussed. Hepatic epithelioid haemangioendothelioma has currently become a good indication for LT with 5- and 10-year post-LT patient survival rates of 83% and 74% respectively and 5- and 10-year recurrence-free survival rates of 82% and 64% respectively. In contrast, the results of LT for haemangiosarcoma (HAS) are disastrous with an universal tumour recurrence within 6 months and no single patient survival after 2 years. Therefore, HAS remains an absolute contraindication to LT. The value of LT in the treatment of infantile haemangioendothelioma is more difficult to evaluate because of the very reduced number of reported cases and because of the often difficult differential diagnosis with angiosarcoma. LT should be reserved to those children not responding to medical treatment on the condition that sarcomatous modifications are excluded by expert pathologists to avoid a futile transplant procedure