Enlarging tongue masses in neurofibromatosis type 1 MR findings of two cases

Plexiform neurofibromas usually occur in the neck, pelvis, and extremities. Jaws and oral cavity plexiform neurofibromas have also been described. Mag netic resonance (MR) patterns for neurofibromas are typical. They include l ow-to-intermediate signal intensity on T1-weighted images, enhancement of t he solid component of the tumor after contrast medium administration, heter ogeneity on T2-weighted images, and in some cases, multiple target signs du e to a collagen central area. We report MR findings of two neurofibromatosi s type 1 (NF1) patients with enlarging tongue plexiform neurofibromas. (C) 2001 Elsevier Science Inc. All rights reserved.