Study to Evaluate the Safety and Effectiveness of Intratumoral Alpha DaRT-224 Treatment for Immunocompromised Patients With Cutaneous Squamous Cell Carcinoma

What this Trial Is About

This trial evaluates the safety and effectiveness of intratumoral Alpha DaRT-224, a device delivering diffusing alpha-emitter radiation, in treating immunocompromised patients with cutaneous squamous cell carcinoma SCC. The study aims to measure the objective response rate ORR using RECIST v1.1 criteria and track progression-free survival PFS, overall survival OS, and local tumor control up to 12 months after treatment. It is a multicenter, single-arm, open-label clinical study involving up to 28 participants. Participants will receive DaRT seeds, which are encapsulated Radium-224 radioactive sources inserted directly into the SCC tumor. These sources emit short-lived alpha particles locally in the tumor microenvironment. The seeds remain implanted for 14 to 21 days before removal. The treatment targets tumors up to 7 cm in size with single lesions that can be fully covered by the radiation sources. The study does not include a comparison group. During the study, participants will undergo multiple CT scans and blood tests to monitor tumor response and safety. Researchers will assess the best overall tumor response starting from the time of DaRT seed removal. Adverse events related to the device will be classified and recorded according to established criteria. Patients must provide informed consent and will be followed for up to 12 months after seed insertion to evaluate survival and tumor control outcomes.

Alpha Radiation Emitters Device (DaRT) for the Treatment of Cutaneous SCC for Immunocompromised Patients