300 Longwood Avenue Boston, MA 02115 (617) 355-6000 Clinical Services (Kidney Tumors): What signs might suggest child has a kidney tumor? The general symptoms of kidney tumors include: a non-tender mass, or lump, felt or seen in the abdomen swelling of the abdomen distended or large veins appearing across the abdomen blood in the urine (hematuria) abdominal pain from pressure on other organs near the tumor decreased appetite, weakness or tiredness fever high blood pressure (hypertension) If your child is exhibiting any of these symptoms, contact us as soon as possible for evaluation. The information on this website should not be taken as medical advice, which can only be given to you by your personal health care professional. Copyright © Children's Hospital Boston. All rights reserved.