Clinical characterization of febrile neutropenia episodes in patients with testicular germ cell tumors.

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Abstract
E16038 Background: Febrile neutropenia (FN) is a serious complication of chemotherapy (CTX). Here, we aim to characterize the clinical course of FN in patients (pts) with testicular germ cell tumors (TGCT). Methods: 413 TGCT patients who underwent at least one cycle of CTX in adjuvant or curative intent were studied within this single-center observational cohort study. Baseline characteristics of the subpopulation with FN are reported in Table 1. Results: During a total number of 1,196 CTX cycles in 413 patients, we observed 70 episodes of febrile neutropenia (16.9%). 55 (79%) of these episodes occurred during the 1stcycle of CTX. The median time between CTX start and FN onset was 14 days [IQR: 12-15, range: 7-18]. One (1%) FN episode was fatal, and 56 patients (80%) had to be hospitalized. Median time in hospital was 7 days [IQR: 6-8, range: 3-12], and the median number of days with an absolute neutrophil count below 0.5G/L was 2 [IQR: 2-3, range: 1-7]. Twelve (20%) FN episodes occurred in the 60 pts who received primary G-CSF support. There was very little treatment delay due to FN (median: 0 days [IQR: 0-0, range: 0-7]. 3 patients (4%) developed a second FN episodes. Conclusions: This study supports prior reports that FN is a relatively frequent complication of CTX in TGCT. However, the case-fatality-rate of FN in TGCT appears to be very low. [Table: see text]