<prompt> Most common intraabdominal solid tumor in childrenWilms tumor NephroblastomaNeuroblastomaRCCAll of the above  <response>: Neuroblastoma is the most common intra-abdominal extra cranial solid tumor in children,accounting for 7-8 of all cancers.It is a malignant tumour of the autonomic nervous system derived from the neural crest. Reference:Essential pediatrics-Ghai,8th edition,page no:616. 