Background: Patients with metastatic penile squamous cell carcinoma (SCC) have a poor prognosis and treatment options are needed when chemotherapy treatment fails. We present the final results of panitumumab treatment from our original series. Patients and Methods: Eligibility included patients with unresectable or metastatic penile SCC, Eastern Cooperative Oncology Group performance status of 0 to 2, and failure of at least 1 chemotherapy regimen. Patients received panitumumab 6.0 mg/kg every 2 weeks until disease progression or unacceptable toxicity. Response was assessed by clinical examination or Response Evaluation Criteria in Solid Tumors version 1.1 criteria every 6 weeks, when applicable. Descriptive statistics were calculated and univariable Cox proportional hazards regression analysis was conducted. Results: Between October 2010 and July 2013, 11 patients were treated. After a median of 5 panitumumab administrations (range, 1-11), we recorded 1 case of Grade 3 cutaneous toxicity and diarrhea each, and 2 cases of Grade 3 mucositis. One patient discontinued treatment because of skin toxicity. Two patients had a complete remission of skin nodules and of skin and nodal metastases, respectively. One patient had a partial regression of skin metastases, and 2 patients stable disease (clinical benefit: 45.5%). Median progression-free survival was 1.9 months (interquartile range [IQR], 0.9-3.0 months) and median overall survival (OS) was 9.5 months (IQR, 4.9-12.6). The presence of visceral metastases showed a trend for association with worse OS (P= .098). Conclusion: Panitumumab was active and safe in patients with highly pretreated penile SCC. The design of combination or sequential strategies with chemotherapy and in an earlier disease stage is warranted.
- Epidermal growth factor receptor
- Monoclonal antibody
- Penilae squamous cell carcinoma
- Penile cancer
ASJC Scopus subject areas