French National Study of Rare Skin Cancers Including Merkel Cell Carcinoma, Advanced Basal Cell Carcinoma, and Cutaneous Adnexal Carcinomas

What this Trial Is About

Researchers are studying three rare types of skin cancer Merkel cell carcinoma, advanced basal cell carcinoma that needs systemic treatment, and cutaneous adnexal carcinomas. These cancers have limited information available about their natural course, prognosis, treatment, and outcomes. The CARADERM project is a national effort in France to collect detailed information about these rare tumors to better understand their characteristics and improve patient care. This study will enroll patients from multiple French centers who have one of these rare skin cancers. It will create a centralized database to track clinical and epidemiological details, including patient factors, cancer stage, lymph node involvement, treatment types such as medical, surgical, and radiotherapy interventions, and responses to these treatments. The database will also record dates of recurrence, death, and latest follow-up. Participants will have their clinical information monitored over time, with data collected on their cancer progression and treatment results. The main outcome measured is the incidence and natural history of these rare skin cancers over a period of 10 years. This long-term follow-up will help researchers identify new prognostic factors and assess how different treatments affect patient outcomes.

French National Database of Rare Dermatological Cancers