Abstract
326 Background: Chemotherapy for penis cancer is used to palliate metastatic disease and treat locally-advanced disease. Pathologic similarities to head and neck SCC suggest that adding docetaxel (T) to platinum-based regimens may enhance efficacy. Methods: A single-stage single-arm phase II trial was conducted. Eligible patients had measurable, histologically proven penile SCC staged M1; or T4, any N, M0; or any T, N3/inoperable N2, M0; or any T, N1, M0 with Multi-Disciplinary Team agreement for chemotherapy as first-line therapy. Treatment was three 21-day cycles of TPF (day 1: T 75mg/m2, P 60mg/m2; days 1-5: F 750mg/m2/day). In 26 evaluable patients ≥14 responses were required to conclude a response rate of ≥60% (p0=0.35, p1=0.60, α=0.1, β=0.2; Fleming-A’Hern design). Primary endpoint was overall response rate at completion/discontinuation of trial treatment. Secondary endpoints included safety, tolerability, progression-free survival (PFS) and overall survival (OS). Results: 29 patients (median age 61 years) were recruited from 9 UK centres between Sept 2009 and Dec 2010. 8 patients were M1. 17 patients had performance status (PS) 0, 11 PS1, 1 PS2. 3 patients discontinued treatment early for reasons other than progression. Dose reductions/delays were reported for 13 patients. 28 patients have on-treatment toxicity data: 19 (68%) experienced grade 3/4 toxicity, with neutropenia most common (n=13, 46%). 7 patients (25%) experienced febrile neutropenia and/or neutropenic sepsis. 10/26 patients (38.5%, 95% CI: 20.2% - 59.4%) in the evaluable population responded. Twelve month PFS was 39.1% (95% CI: 20.9% - 56.8%; median PFS (all 29 patients/M1/M0): 7.1/ 3.1/ 9.6- months). Twelve month OS was 54.6% (34.9% - 70.6%; median OS (all patients/M1/M0): 13.7/ 6.9/ not reached yet-months). Conclusions: UK clinicians successfully recruited to a multi-centre trial in penis cancer, establishing a network of centres for future studies. Toxic effects of TPF were common but not unexpected. The trial did not reach its target response rate of ≥60% to justify further investigation although PFS and OS in this cohort compares favourably to reported data in literature.
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