CemiplimAb-rwlc survivorship and epidemiology (CASE): A prospective study of safety and efficacy of cemiplimab in patients with advanced basal cell carcinoma in a real-world setting.

Abstract

TPS9614 Background: Basal cell carcinoma (BCC) is the most common form of non-melanoma skin cancer in the United States. Surgical excision is the standard treatment, with < 1% of cases progressing to locally advanced or metastatic disease. Hedgehog pathway inhibitors (HHIs) are the first-line therapy for advanced BCC (aBCC); the US Food and Drug Administration and European Medicines Agency have approved the use of cemiplimab (a programmed cell death-1 inhibitor) in advanced BCC (aBCC) patients previously treated with (or are inappropriate for) HHI. Limited real-world data exist on the clinical characteristics, disease management and progression, and survivorship of patients with aBCC. The ongoing C.A.S.E. study aims to evaluate the efficacy, safety, disease evolution, survivorship, and patient reported outcomes (PRO) in patients treated with cemiplimab in the real-world setting. Methods: This trial in progress (NCT03836105) aims to describe the effectiveness and safety of cemiplimab 350 mg administered every 3 weeks for treatment of patients with aBCC in real-world clinical settings. Up to 100 adult patients with aBCC who are prescribed commercially available cemiplimab from ~65 study sites in the United States will be included. The duration of follow-up will be 24 months. Endpoints for this study relate to real-world efficacy, including overall survival; progression-free survival; objective response rate, (partial or complete response); and disease control rate, defined as the percentage who do not progress for ≥ 6 months; Time to response, duration of response, time to treatment failure, and disease-specific death will also be assessed. Real-world safety outcomes will also be captured, including immune-related adverse events, infusion-related reactions, and serious adverse events. Patient selection criteria and treatment patterns will be analyzed using descriptive statistics. This study also aims to describe the patient experience of real-world treatment with cemiplimab. PROs including global quality of life, functioning, and symptoms will be captured at baseline and follow-up visits via the EORTC QLQ-C30 and the Skin Care Index. Recruitment for this trial is ongoing. Clinical trial information: NCT03836105 .