Cholecystitis, AcuteCholecystitisAcalculous CholecystitisGallbladderCholecystostomyCholecystectomyCholecystectomy, LaparoscopicImino AcidsTokyoTechnetium Tc 99m DisofeninCholecystographyEmphysematous CholecystitisGallbladder DiseasesCholelithiasisCholecystolithiasisGallstonesAcute DiseaseGangreneGallbladder NeoplasmsConversion to Open SurgeryPostoperative ComplicationsCholangitisTechnetium Tc 99m LidofeninBiliary Tract DiseasesCystic DuctOrganotechnetium CompoundsRetrospective StudiesHemobiliaCholangiopancreatography, Endoscopic RetrogradeCholangiopancreatography, Magnetic ResonanceXanthomatosisCholedocholithiasisDrainageTreatment OutcomeEndoscopy, Digestive SystemLength of StayIntraoperative ComplicationsCholangiographyRupture, SpontaneousCommon Bile DuctTechnetiumAbdomen, AcuteAbdominal PainTime FactorsPancreatitisBile DuctsTomography, X-Ray ComputedEmergenciesFalse Positive ReactionsEmergency TreatmentBiliary TractSphincterotomy, EndoscopicFalse Negative ReactionsProspective Studies