RT Journal Article SR Electronic T1 Predictive Impact of Prognostic Nutritional Index on Pembrolizumab for Metastatic Urothelial Carcinoma Resistant to Platinum-based Chemotherapy JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 1607 OP 1614 DO 10.21873/anticanres.14922 VO 41 IS 3 A1 ISHIYAMA, YUDAI A1 KONDO, TSUNENORI A1 NEMOTO, YUKI A1 KOBARI, YUKI A1 ISHIHARA, HIROKI A1 TACHIBANA, HIDEKAZU A1 YOSHIDA, KAZUHIKO A1 HASHIMOTO, YASUNOBU A1 TAKAGI, TOSHIO A1 IIZUKA, JUNPEI A1 TANABE, KAZUNARI YR 2021 UL http://ar.iiarjournals.org/content/41/3/1607.abstract AB Background/Aim: We investigated the prognostic nutritional index (PNI), comprised of lymphocytes and albumin, as a potential prognosticator of metastatic urothelial carcinoma (mUC) patients receiving pembrolizumab. Patients and Methods: Sixty-five patients were retrospectively enrolled and classified as low (<40) and high (≥40) based on pretreatment PNI. Progression-free survival (PFS), overall survival (OS) and response rates were evaluated. Results: In the low PNI group, significantly shorter PFS and OS were observed. PNI was shown to be an independent predictor of PFS and OS in the multivariate analysis. C-index for both PFS and OS improved with the addition of PNI to the model described in the KEYNOTE-045 study. Significantly more patients experienced initial disease progression in the low PNI group. Conclusion: PNI is a useful predictor of prognosis and disease progression in mUC patients receiving pembrolizumab.