Anastomotic LeakColorectal SurgeryAnastomosis, SurgicalColorectal NeoplasmsColectomySurgical StaplingSurgical SpongesEsophagostomySurgical Wound DehiscenceRectumSurgical StaplersDigestive System Surgical ProceduresRectal NeoplasmsEsophagectomyProsthesis RetentionPostoperative ComplicationsColonic DiseasesColon, SigmoidColostomyColonGastrectomyDrainageRectal DiseasesDecontaminationSuture TechniquesEsophageal NeoplasmsTreatment OutcomeOmentumAdenocarcinomaAdenomaRetrospective StudiesReoperationEsophagusRisk FactorsLaparoscopyColonoscopy