Pseudarthrosis of the ulna in a patient with neurofibromatosis

A case of pseudoarthrosis and partial resorption of the ulna in a 12-year-old girl with neurofibromatosis is described. Neurofibromatosis is a common neurocutaneous disease with characteristic osseous lesions. The pseudoarthrosis in this case developed after fracture. The bone most commonly affected is the tibia and involvement of the ulna has been reported in only a few cases. The possible cause of pseudoarthrosis, the radiographic changes, and the treatment are discussed.