Split fat sign
The split fat sign is feature that can be seen typically on MRI images with peripheral nerve sheath tumors. It is seen as a fine rind of fat around the lesion. It is best appreciated on T1 weighted images 1. On coronal or sagittal images (i.e.images along the direction of the nerve) a tapered rim of fat signal may seen adjacent to the proximal and distal ends of the lesion 1.
- 1. Chee DW, Peh WC, Shek TW. Pictorial essay: imaging of peripheral nerve sheath tumours. Can Assoc Radiol J. 2011;62 (3): 176-82. doi:10.1016/j.carj.2010.04.009 - Pubmed citation
- 2. Beaman FD, Kransdorf MJ, Menke DM. Schwannoma: radiologic-pathologic correlation. Radiographics. 2004;24 (5): 1477-81. doi:10.1148/rg.245045001 - Pubmed citation
- 3. Chhabra A, Williams EH, Wang KC et-al. MR neurography of neuromas related to nerve injury and entrapment with surgical correlation. AJNR Am J Neuroradiol. 2010;31 (8): 1363-8. doi:10.3174/ajnr.A2002 - Pubmed citation