Prognostic value of the neutrophil/lymphocyte ratio in enteropancreatic neuroendocrine tumors

Supervivència lliure de progressió; Tumors neuroendocrins Supervivencia libre de progresión; Tumores neuroendocrinos Progression-free survival; Neuroendocrine tumors Accessible prognostic tools are needed to individualize treatment of neuroendocrine tumors (NETs). Data suggest neutrophil/lymphocyte ratios (NLRs) have prognostic value in some solid tumors, including NETs. In the randomized double-blind CLARINET study (NCT00353496; EudraCT 2005-004904-35), the somatostatin analog lanreotide autogel/depot increased progression-free survival (PFS) compared with placebo in patients with inoperable or metastatic intestinal and pancreatic NETs (grades 1–2, Ki-67 4; n = 25)]. Furthermore, NLRs were not prognostic in Cox models, irrespective of subgroups used. The therapeutic effect of lanreotide autogel/depot 120 mg was independent of NLRs (P > 0.1). These exploratory post-hoc analyses in patients with advanced intestinal and pancreatic NETs contrast with previous data suggesting NLR has prognostic potential in NETs. This may reflect the inclusion of patients with lower-grade tumors or use of higher NLR cutoff values in the current analysis. The CLARINET study was sponsored by Ipsen, the manufacturer of lanreotide autogel/depot. Medical writing services were provided by Nicky French PhD of Watermeadow Medical (Macclesfield, UK) – an Ashfield Company, part of UDG Healthcare plc – sponsored by Ipsen Ltd, Slough, UK in accordance with Good Publication Practice guidelines.