[Imaging features of neurofibromatosis involving the urinary bladder].

Neurofibromatosis type 1 is a phacomatosis with neurocutaneous involvement. Urinary bladder involvement is rare and the imaging features are seldom reported. Involvement of the urinary bladder may be isolated or associated with more diffuse disease. The imaging features of neurofibromas are fairly characteristic and may often suggest the correct diagnosis, especially in patients with known NF1. We report the imaging features of bladder involvement in 3 patients with known NF1.