Paclitaxel-based high-dose chemotherapy (HDCT) for relapsed or refractory germ cell tumors (GCTs): Clinical outcome and quality of life (QOL) in long-term survivors.

Abstract

325 Background: HDCT is a viable and potentially curative approach for patients with relapsed or refractory GCTs. However, no comparative data exist to define the optimal chemotherapeutic strategy. Herein, long-term follow-up data and QOL assessments are provided for an expanded cohort of patients treated with high-dose paclitaxel, etoposide, carboplatin, and ifosfamide (TECTIC). Methods: Details of the TECTIC regimen and clinical follow-up data for an initial 33 patients have been previously reported (Margolin Biol Blood Marrow Trans 2005). Surviving patients were surveyed using a modified EORTC Quality of Life Questionnaire-30 (QLQ-C30) and the Functional Assessment of Cancer Therapy-Taxane (FACT-T) questionnaire; results were compared to relevant historical cohorts using a 2-sample t-test. Cardiovascular morbidity (CM) was ascertained through queries regarding use of antihypertensive (AH) or cholesterol-lowering (CL) agents, and presence/absence of diabetes mellitus (DM). Results: Forty-six patients received protocol-based therapy. Of these, 17 patients were progression-free at a median of 112.7 mos (49.5-170.2), and 6 patients remain alive following progression with a median overall survival (OS) of 64.4 mos (43.6-147.1). Median progression-free survival (PFS) and OS were 11.8 mos (95%CI 5.8-NR) and 21.7 months (95%CI 12.7-NR), respectively. Of the 23 patients still alive, 18 patients were accessible and consented to telephonic interview. As compared to historical cohorts (Rossen J Clin Oncol 2009), survivors had a higher global health scale score (87.04 v 75.62; P=0.02) but a lower physical functioning score (68.89 v 92.66; P=0.0001) by the QLQ-C30 scale. No difference in FACT-T scores were observed as compared to historical cohorts (Cella Cancer 2003). Four patients (22%) had DM. Three patients (17%) and 4 patients (22%) reported use of AH and CL agents, respectively. Conclusions: HDCT with the TECTIC regimen produces durable remissions in patients with relapsed or refractory GCTs, with acceptable QOL and CM in long-term survivors.