NCT07104604 2025-08-08Study on the Efficacy and Safety of Neoadjuvant Radiotherapy Combined With Toripalimab, Liposomal Irinotecan, and Capecitabine in the Treatment of pMMR Locally Advanced Rectal Adenocarcinoma With Low Rectal InvolvementAffiliated Cancer Hospital of Shantou University Medical CollegePhase 1 Recruiting59 enrolled