Local treatment of pancreatic cancer metastases: A multicenter French study of the AGEO group.

ABSTRACT

OBJECTIVE: This study reports the efficacy and safety of local treatment of metastases of pancreatic ductal adenocarcinoma (PDAC), with a curative intent. METHODS: We retrospectively included patients with histologically proven PDAC, who underwent a local treatment for metastases between January 1, 2000 and December 31, 2017, from 11 French hospitals. Complications of local treatment were reported. Univariate Cox models were performed to identify prognosis factors associated with overall survival (OS) and disease-free survival (DFS). RESULTS: We included 52 patients treated for 68 metastases; 33 (64%) of whom had metachronous metastases. Metastatic sites treated were 39 (57%) hepatic, 18 (27%) pulmonary and 11 (16%) others. Metastases treatments were 45 (66%) surgery, 9 (13%) radiofrequency and 14 (21%) other procedures. The rates of severe complications and mortality were respectively 10% and 4%. The median OS and DFS after local treatment were 36.5 months and 12.7 months, respectively. Prognosis factors associated with a shorter OS were liver metastases when compared with lung metastases (HR 4.04; 95%CI 1.18-13.81), N2 status of primary pancreatic tumor when compared to N0-N1 (HR 9.43; 95%CI 2.44-36.36) and synchronous metastases when compared to metachronous metastases (HR 2.34; 95%CI 1.05-5.23). N2 status of primary pancreatic tumor was associated with a shorter DFS when compared to N0-N1 (HR 2.82; 95%CI 1.05-7.58). CONCLUSION: In this series of highly selected patients, local treatment of metastases from PDAC is associated with prolonged survival. The rate of severe complications was low. Factors associated with shorter OS were liver metastases, N2 status and synchronous metastases.