Department of Genitourinary Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
Kyle M. Rose , Darren Sanchez , Arfa Mustasam , Reagan Sandstrom , Kathryn Marchetti , Niki Marie Zacharias , Lance C. Pagliaro , Constantine Alifrangis , Kelvin A. Moses , Maarten Albersen , Eduard Roussel , Viraj A. Master , Bassel Nazha , Tony Zhuang , Jeffrey S. Montgomery , Chris Protzel , Marcos Tobias Machado , Philippe E. Spiess , Curtis Alvin Pettaway , Jad Chahoud
Background: The efficacy of neoadjuvant platinum-based chemotherapy (NAPC) in penile squamous cell carcinoma (PSCC) was provided by small clinical trials, leaving clinicians with scant evidence-based guidance. Thus, we aimed to analyze real-world outcomes of patients with PSCC who received NAPC prior to surgical resection. Methods: Patients from 9 tertiary care centers who had undergone NAPC prior surgical resection for PSCC were included with locally advanced (cTany, cN+), non-metastatic (M0) disease. The primary and secondary outcomes were overall survival (OS) and progression-free survival (PFS), Response was determined via best overall response measured with RECIST 1.1 criteria. Results: 167 patients were included, 137 (84%), of which received TIP prior to surgical resection. Ninety-two (55%) patients died during follow up, and the mean follow up for survivors was 57 months. The median OS was 42 months, while the median PFS was 17 months. The table details the response rates to NAPC, the associated survival, and Cox Proportional Hazards Modelling of OS and PFS. Predictors for OS and RFS included lymphovascular invasion, positive number of lymph nodes, extranodal extension, downstaging, best overall response, and ypN status. Figure 1 demonstrates OS outcomes by RECIST best response after chemotherapy, presence of downstaging after NAPC, ypN stage, and presence of extranodal extension. Conclusions: Upfront NAPC is effective in patients with lymph node metastases from penile carcinoma. Unsurprisingly, patients who demonstrated a robust response to therapy had improved survival outcomes compared to those who had not—as measured by RECIST criteria, tumor downstaging, pN staging, and presence of extranodal extension. This study represents the largest conglomeration of multi-institutional penile carcinoma patients treated with NAPC, and provides further supportive data for multimodal therapy for advanced penile cancer patients while prospective clinical trials complete accrual.
Neoadjuvant platinum chemotherapy response and survival data for patients with locally advanced penile carcinoma. | |||
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Entire Cohort | Median OS (Months) | 95% CI | p-value |
Progression-Free Survival Overall Survival | 17.0 42.0 | 9.8 - 24.2 29.1 – 54.8 | |
Best Objective Response Progressive Disease Stable Disease Partial Response Complete Response | 16.0 51.0 56.0 119.0 | 11.9-20.1 13.4-88.6 13.8-98.1 0.0-247.0 | <0.01 |
Cox Regression for OS Lymphovascular Invasion Number of Positive Lymph Nodes Extranodal Extension Downstaging after Chemotherapy Complete Response Progressive Disease Partial Response Stable Disease ypN0 ypN1 ypN2 ypN3 | Hazard Ratio 1.53 1.06 1.99 2.23 Ref 3.40 1.69 1.60 ref 0.28 1.10 1.97 | 1.02-2.36 1.1-1.2 1.23-3.25 1.29-3.83 1.3-8.8 0.66-4.30 0.59-4.33 ref 0.04-2.16 0.41-2.99 1.12-3.50 | 0.04 <0.01 <0.01 <0.01 0.01 0.27 0.35 0.22 0.85 0.02 |
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Abstract Disclosures
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