Some signs and symptoms are not common. Any newborn child with a cat's eye—a white dot in the center of the eye—should be seen by a physician, since the dot may indicate a retinoblastoma. It is also very rare for children to have blood in their urine, so any child with this complaint should be seen by a physician. Blood in the urine may be the result of an infection, but may also be caused by Wilms' tumor .
