[1]Department of General Surgery;
the Second Xiangya Hospital;
Central South University;
Changsha 410011;
Hunan Province;
China;
[1]Department of General Surgery;
the Second Xiangya Hospital;
Central South University;
Changsha 410011;
Hunan Province;
China;
[1]Department of General Surgery;
the Second Xiangya Hospital;
Central South University;
Changsha 410011;
Hunan Province;
China;
[1]Department of General Surgery;
the Second Xiangya Hospital;
Central South University;
Changsha 410011;
Hunan Province;
China;
[1]Department of General Surgery;
the Second Xiangya Hospital;
Central South University;
Changsha 410011;
Hunan Province;
China;
[1]Department of General Surgery;
the Second Xiangya Hospital;
Central South University;
Changsha 410011;
Hunan Province;
China;
[1]Department of General Surgery;
the Second Xiangya Hospital;
Central South University;
Changsha 410011;
Hunan Province;
China;
[1]Department of General Surgery;
the Second Xiangya Hospital;
Central South University;
Changsha 410011;
Hunan Province;
China;
Low rectal cancer; Photodynamic therapy; Positive microscopic distal margin; Salvage therapy; Removal; Residual microscopic cancer; Case report;