Neoadjuvant platinum-based chemotherapy for clinically node-positive penile squamous cell carcinoma: An international, multicenter, real-world study.

Authors

null

Kyle M. Rose

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

Organizations

Department of Genitourinary Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, Department of Urology, University of Texas MD Anderson Cancer Center, Houston, TX, H. Lee Moffitt Cancer Center, Tampa, LA, H. Lee Moffitt Cancer Center, Tampa, FL, University of Michigan, Ann Arbor, MI, Mayo Clinic, Rochester, MN, University College London Hospitals NHS Foundation Trust, London, United Kingdom, Vanderbilt Univ. Medical Center, Nashville, TN, University Hospitals Leuven, Leuven, Belgium, University of Leuven, Leuven, Belgium, Emory University, Atlanta, GA, Winship Cancer Institute of Emory University, Atlanta, GA, Department of Medicine, Emory University School of Medicine, Atlanta, GA, University Hospital, Leuven, Belgium, Rede D'or Hospital Sao Luiz, Sao Paulo, Brazil, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, University of Texas MD Anderson Cancer Center, Houston, TX

Research Funding

No funding received
None.

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.
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 Details

Meeting

2023 ASCO Genitourinary Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session C: Renal Cell Cancer; Adrenal, Penile, Urethral and Testicular Cancers

Track

Renal Cell Cancer,Adrenal Cancer,Penile Cancer,Testicular Cancer,Urethral Cancer

Sub Track

Therapeutics

Citation

J Clin Oncol 41, 2023 (suppl 6; abstr 9)

DOI

10.1200/JCO.2023.41.6_suppl.9

Abstract #

9

Poster Bd #

D14

Abstract Disclosures

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