<prompt> What is the most important good prognostic factor for neuroblastoma?Telomerase expressionMRP expressionLoss of 11qCD44 expression  <response>: Ans. is d i.e., CD44 expression Prognostic Factors in NeuroblastomasVariableFavorableUnfavorableStageStage 1, 2A, 2B, 4SStage 3, 4Age 1 year 1 yearHistology Evidence of schwannian stroma and gangliocytic differentiationPresentAbsent Mitotic rateLowHigh Mitosis-karhorrhexis index 200500 cells 200500 ceils Intratumoral calcificationPresentAbsentDNA ploidyHyperdiploid or near-triploidDiploid, near-diploid or near-tetraploidN-mycNot amplifiedAmplifiedChromosome 17q GainAbsentPresentChromosome 1p LossAbsentPresentChromosome 1 1q lossAbsentPresentTrK - B expressionAbsentPresentTrk-A ExpressionPresentAbsentTelomerase ExpressionLow or absentHighly expressedMRP ExpressionAbsentPresentCD-44 ExpressionPresentAbsentSerum Biochemical Markers FerritinNormalElevated Lactate Dehydrogenase 1500UmL 1500 UmL 