DiverticulitisSigmoid DiseasesDiverticulitis, ColonicColon, SigmoidSigmoid NeoplasmsDiverticulum, ColonIntestinal PerforationColectomyDiverticulumColonic DiseasesDiverticulosis, ColonicColostomyJejunal DiseasesIntestinal VolvulusUrinary Bladder FistulaBarium SulfateIntestinal ObstructionIntestinal FistulaEnemaAppendicitisColonoscopyDigestive System Surgical ProceduresLaparoscopyAnastomosis, SurgicalSurgical Procedures, ElectivePneumoperitoneumAppendixPeritonitisWatchful WaitingTomography, X-Ray ComputedCecal DiseasesColonAbdominal PainMeckel DiverticulumAbdomen, AcutePeritoneal LavageCranial SinusesGastrointestinal HemorrhageAcute DiseaseLaparotomyTherapeutic IrrigationRecurrenceAbscessSigmoidoscopyAbdominal AbscessAnastomotic LeakRetrospective StudiesTreatment OutcomeFistulaMesocolonForeign-Body ReactionPostoperative Complications