RT Journal Article SR Electronic T1 Malignant Peripheral Nerve Sheath Tumor in the Parapharyngeal Space: Tumor Spread through the Eustachian Tube JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 748 OP 750 VO 22 IS 4 A1 Jeong Hyun Lee A1 Ho Kyu Lee A1 Choong Gon Choi A1 Dae Chul Suh A1 Kwang Sun Lee A1 Shin Kwang Khang YR 2001 UL http://www.ajnr.org/content/22/4/748.abstract AB Summary: We report the CT and MR findings in a patient with malignant peripheral nerve sheath tumor in the parapharyngeal space who had neither a family history nor stigmata of neurofibromatosis. A high-resolution CT scan of the temporal bone revealed bony erosion and widening of both the foramen ovale and the bony portion of the eustachian tube. A temporal bone MR image showed an intensely enhancing solid mass in the parapharyngeal space, which extended into the middle ear cavity via the eustachian tube.