NCT07509424 2026-04-03Neoadjuvant Short-course Radiotherapy Followed by a Combination of Disitamab Vedotin, Sintilimab, and Capecitabine in Locally Advanced HER2-expressing Rectal CanceUnion Hospital, Tongji Medical College, Huazhong University of Science and TechnologyPhase 2 Not yet recruiting29 enrolled