<prompt> All are good prognostic factors for neuroblastoma except-Trk-A expression absentAbsence of 1plossAbsence of 17 p gainAbsence of 11 qloss  <response>: Ans. is a i.e., Trk-A expression absent Prognostic Factors in NeuroblastomasVariableFavorableUnfavorableStage Age HistologyStage 1,2A, 2B,4S 1 yearStage 3,4 1 yearEvidence of schwannian stroma and gangliocytic differentiation Mitotic rateMitosis-karhorrhexis index Intratumoral calcification DNA ploidyPresent Low 200500 cellsPresentHyperdiploid or near-triploidAbsent High200500 cellsAbsentDiploid, near-diploid or near-tetraploid N-mycChromosome I7q GainChromosome Ip LossChromosome 11 q lossTrK-B expressionTrk-A ExpressionTelom erase ExpressionMRP ExpressionCD-44 ExpressionSerum Biochemical MarkersFerritinLactate DehydrogenaseNot amplifiedAbsentAbsentAbsentAbsentPresentLow or absentAbsentPresent Normal 1500 UmL.AmplifiedPresentPresentPresentPresentAbsentHighly expressedPresentAbsent Elevated1500 UmL. 