[Statistical observation on abdominal neoplasms in children, with special reference to Wilms' tumor].
D000008:Abdominal Neoplasms / Q000453:epidemiology*; D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D006869:Hydronephrosis / Q000453:epidemiology; D007223:Infant; D007564:Japan; D007680:Kidney Neoplasms / Q000453:epidemiology*; D009447:Neuroblastoma / Q000453:epidemiology; D009396:Wilms Tumor / Q000453:epidemiology*