Sequential salvage chemotherapy for CDDP-refractory advanced testicular cancer: Japanese high-volume center experience.

Abstract

e15526 Background: Chemotherapy- refractory or resistant GCTs, so called ‘difficult-to-treat’ GCTs would remain continuously disease-free with salvage chemotherapy or surgery. The optimal salvage chemotherapy remains unclear. The aim of this study was to assess the efficacy of ‘sequential’ chemotherapy for advanced testicular cancer. Methods: Salvage chemotherapy was required in 129 patients out of 233 advanced GCTs treated at Kyoto Prefectural University of Medicine from June, 1998 to December, 2011. Clinical outcomes were retrospectively assessed. Results: Median age was 31 year-old (range:17-65y.o.). Non-seminoma was in 111 cases (86.0%). IGCCC showed good in 37 cases (28.9%), intermediate 33 (25.6%), poor 47 (36.4%), and unknown 12 (9.1%). As the 2nd line therapy, VIP/VeIP and TIP/N therapy were done in 43 (33.3%) and 49 cases (38.0%), respectively. With regard to the patients requiring 3rd line or more chemotherapy, 95, 67, 40, 26 cases had 3rd, 4th, 5th and 6th line or more chemotherapy, respectively. TIN therapy was performed in 48 patients as 3rd line and in 24 patients as 4th line. Irinotecan-containing chemotherapy was done in 24 and 36 cased as 2nd +3rd line therapy and 4th line or more, respectively. Gemcitabine-containing therapy was done in 33 cases with 3rdline or more chemotherapy. Overall survival rate at median follow-up period was 71.0%at median follow-up of 48m. Overall survival stratified by IGCCC was shown in the figure. There was no significant difference between any two groups. Clinical outcomes showed no evidence of disease (NED) was obtained in 86.1% with second line therapy. Noteworthy mentioned, about 40% patients had NED even in the 4thline or more chemotherapy group. Conclusions: Relatively good prognosis was obtained in the patients with salvage chemotherapy at Japanese high volume center. Sequential continuous chemotherapy would be very important to manage ‘difficult-to-treat’ advanced germ cell tumors.