MucoceleParanasal Sinus DiseasesFrontal SinusLip DiseasesFrontal SinusitisEthmoid SinusitisEthmoid SinusOtorhinolaryngologic Surgical ProceduresSphenoid SinusMaxillary SinusPseudomyxoma PeritoneiRetrospective StudiesSensitivity and SpecificityEndoscopyTomography, X-Ray ComputedDiagnosisEarly DiagnosisDiagnostic ErrorsTreatment OutcomePrenatal DiagnosisDelayed DiagnosisReproducibility of ResultsAutopsyPredictive Value of TestsBiopsyProspective StudiesMagnetic Resonance ImagingPolymerase Chain ReactionInfant, NewbornTime Factors