Abstract

The prognostic nutritional index is a potential predictive indicator in other cancers and can be easily determined at low cost. To identify useful prognostic markers for high-grade neuroendocrine carcinomas, we examined the prognostic significance of the prognostic nutritional index in patients with resected high-grade pulmonary neuroendocrine carcinoma. We retrospectively reviewed perioperative clinical and laboratory data of patients who underwent pulmonary resection for high-grade neuroendocrine carcinoma between January 2000 and December 2014. Associations between the preoperative prognostic nutritional index and the patients' clinicopathological characteristics were analyzed to determine its prognostic significance. The study comprised 61 patients, the majority of whom were men (85%). The median age was 70.0years, and the median follow-up period was 42months. No significant differences in the clinicopathological characteristics were observed between the high and low prognostic nutritional index groups. The 5-year overall survival and recurrence-free survival times were significantly shorter in the low prognostic nutritional index group than in the high prognostic nutritional index group (78.8% vs. 51.4% and 71.7% vs. 34.5%, respectively; p < 0.05). The prognostic nutritional index was confirmed as an independent prognostic factor (hazard ratio: 2.419, 95.0% confidence interval: 1.044-5.606; p < 0.05). A significantly greater proportion of patients developed distant metastases in the low prognostic nutritional index group than in the high prognostic nutritional index group (p < 0.05). A low prognostic nutritional index is associated with poor survival in patients with resected high-grade pulmonary neuroendocrine carcinoma.

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