The doctor will start with a thorough medical history and physical exam. He or she will look for changes in skin, tumors, and bone abnormalities. A parent or sibling with NF will also lead the doctor to suspect NF in the child. When a doctor suspects NF2, x-rays and MRI /CAT scans of the brain and spine may be ordered. Blood tests for both NF1 and NF2 are also available.