Lead RadioisotopesPeritoneal NeoplasmsPeritoneal DiseasesDelayed DiagnosisSensitivity and SpecificityTunica IntimaPrenatal DiagnosisEarly DiagnosisTomography, X-Ray ComputedMagnetic Resonance ImagingImage EnhancementTime FactorsRetrospective StudiesDiagnosisContrast MediaPleural DiseasesBiopsyReproducibility of ResultsPredictive Value of TestsCarotid ArteriesDiagnostic ErrorsTunica MediaProspective StudiesHyperplasiaGadolinium DTPAFollow-Up StudiesTreatment Outcome