MicrosurgeryProctoscopyAnal CanalAdenoma, VillousNatural Orifice Endoscopic SurgeryRectal NeoplasmsRectoceleDigestive System Surgical ProceduresLaser TherapySurgical StaplingRectovaginal FistulaRectal ProlapseProctoscopesSpisulaLasers, GasRectal FistulaSurgical StaplersAdenomaRectumAndrologyNeurosurgeryHirschsprung DiseaseVasovasostomyFecal IncontinenceTreatment OutcomeNeurosurgical ProceduresOrgan Sparing TreatmentsSurgery, Computer-AssistedAnastomosis, SurgicalNeoplasm Recurrence, LocalVideo-Assisted SurgeryRadiosurgeryAmputation, TraumaticLaryngeal NeoplasmsPituitary IrradiationEndoscopyLasersRetrospective StudiesHemorrhoidsRectal DiseasesFollow-Up StudiesEarly Detection of CancerPostoperative ComplicationsSurgical InstrumentsEndoscopy, GastrointestinalLaryngoscopyNeuroma, AcousticUrinary FistulaReplantationParticle AcceleratorsFallopian Tube DiseasesEnterocolitisReconstructive Surgical ProceduresAnus NeoplasmsNeurilemmomaSurgical FlapsProctocolectomy, RestorativeNeoplasm StagingMeningiomaConstipationEquipment Design