Laparoscopic radical distal pancreatectomy with portal venous tumor thrombectomy for the treatment of pancreatic acinar cell carcinoma after neoadjuvant chemotherapy - Sun, Mengqing; Bai, Xuesong; Chang, Xiaoyan; Wu, Huanwen; Cheng, Yuejuan; He, Xiaodong; Han, Xianlin (HepatoBiliary Surgery and Nutrition, 2023)