<prompt> Neuroblastomas - good prognositc factor isN-myc amplificationRAS oncogeneHyperdiploidyTranslocations  <response>: Ref : Sabiston 20th edition Pgno : 1887-1888 Neuroblastoma prognostic factors Favorable prognosis Unourable Prognosis Age 1 year Thoracic primary lesion Shimada index showing well differentiated stromal rich tumor Increased ratio of VMAHVA Normal serum ferritin Hyperdiploid or near triploid High level of expression of Trk-A gene N-myc amplification 10 Deletion of 1pmost characteristic cytogenetics abnormality and gain of 17q Expression of multidrug resistance protein Over expression of telomerase Increased serum ferritin Diploid Older patients of stages III and IV 