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American Journal of Neuroradiology, Vol 19, Issue 9 1799-1801, Copyright © 1998 by American Society of Neuroradiology

ARTICLES

Focal orbital amyloidosis presenting as rectus muscle enlargement: CT and MR findings

K Okamoto, J Ito, I Emura, T Kawasaki, T Furusawa, K Sakai and S Tokiguchi
Department of Radiology, Niigata University School of Medicine, Japan.

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.




Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X