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Case Reports in Radiology
Volume 2012, Article ID 103154, 3 pages
http://dx.doi.org/10.1155/2012/103154
Case Report

Intramuscular Dirofilariasis Mimicking an Orbital Metastasis in a Patient with Breast Cancer

1College of Osteopathic Medicine, Des Moines University, 3200 Grand Ave. Des Moines, IA 50312, USA
2Department of Radiology, Mayo Clinic, 200 1st Street SW, Rochester, MN 55905, USA
3Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 1st Street SW, Rochester, MN 55905, USA
4Department of Ophthalmology, Mayo Clinic, 200 1st Street SW, Rochester, MN 55905, USA

Received 25 July 2012; Accepted 13 August 2012

Academic Editors: G. Bastarrika, K. Hayakawa, and M. Leonardi

Copyright © 2012 Brett M. Henderson et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present the unusual case of a 74 year-old female with a history of breast cancer who presented with acute painless orbital swelling and vertical diplopia. MRI revealed a focal enhancing mass within the superior rectus muscle. As the concern for metastatic disease was high, surgical biopsy was performed and revealed an unusual mimicker of metastatic disease, the parasitic infection dirofilariasis.