<prompt> Which is the commonest abdominal mass in neonate -Wilms tumorPolycystic kidneyNeuroblastomaRhabdomyosarcoma  <response>: Ans. is c i.e., Neuroblastoma The commonest intra-abdominal tumor in first two years of life Neuroblastoma The commonest intra-abdominal tumor between 2d to 5th year of life - Wihns tumor The commonest intra-abdominal tumor in children no age specification Neuroblastoma Wilms tumor is the second most common abdominal tumor in children Remember: The commonest cause of abdominal mass in Newborn is : Multiple dysplastic kidneys if neoplasm or tumor has not been mentioned when asking for the commonest intra-abdominal mass, the answer will be multiple dysplastic kidneys 