TY - JOUR T1 - Focal orbital amyloidosis presenting as rectus muscle enlargement: CT and MR findings. JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1799 LP - 1801 VL - 19 IS - 9 AU - K Okamoto AU - J Ito AU - I Emura AU - T Kawasaki AU - T Furusawa AU - K Sakai AU - S Tokiguchi Y1 - 1998/10/01 UR - http://www.ajnr.org/content/19/9/1799.abstract N2 - We report a case of focal orbital amyloidosis involving rectus muscles, which is an extremely rare clinical condition. CT scans showed rectus muscle enlargement with punctate calcifications. Heterogeneous hypointensity was present on T2-weighted MR images, and homogeneous enhancement was seen on fat-saturated contrast-enhanced images of the muscles. These imaging findings seem to be suggestive of amyloidosis. Focal amyloidosis should be included in the differential diagnosis of extraocular muscle enlargement. ER -