RT Journal Article SR Electronic T1 Aggressive fibromatosis of the neck: MR findings. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1429 OP 1431 VO 18 IS 8 A1 M Garant A1 H Remy A1 N Just YR 1997 UL http://www.ajnr.org/content/18/8/1429.abstract AB We present a case of aggressive fibromatosis of the scalene and longus colli muscles with surgically proved secondary involvement of the brachial plexus and carotid sheath in a 29-year-old woman in whom MR imaging failed to show involvement of the carotid sheath. The well-defined lesion was isointense on T1-weighted images and hyperintense on T2-weighted images relative to adjacent normal muscle and enhanced brightly.