Neoplasm Regression, SpontaneousRemission, SpontaneousThoracic NeoplasmsRhabdomyomaRemission InductionHemangioendotheliomaNeuroblastomaLentiviruses, Ovine-CaprineKeratoacanthomaBlisterGanglioneuromaTomography, X-Ray ComputedSkin NeoplasmsLung NeoplasmsHistiocytosis, Langerhans-CellLiver NeoplasmsPrognosisalpha-FetoproteinsFollow-Up StudiesRegression AnalysisPleural NeoplasmsBiopsyCarcinoma, HepatocellularTime FactorsBreast NeoplasmsRisk FactorsImmunohistochemistryMagnetic Resonance ImagingInfant, NewbornCase-Control StudiesEarly Detection of CancerProstatic NeoplasmsProspective StudiesLogistic ModelsGenetic Predisposition to DiseaseOvarian NeoplasmsNeoplasmsTreatment OutcomeOdds RatioRetrospective StudiesStomach NeoplasmsRegistriesAntineoplastic Combined Chemotherapy ProtocolsSurvival Analysis