[Preoperative diagnosis of cancer in young children].
D000008:Abdominal Neoplasms / Q000175:diagnosis* / Q000601:surgery; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000601:surgery; D008297:Male; D008479:Mediastinal Neoplasms / Q000175:diagnosis* / Q000601:surgery; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000601:surgery