title: Intramuscular dirofilariasis mimicking an orbital metastasis in a patient with breast cancer.
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.
authors.affiliation: College of Osteopathic Medicine, Des Moines University, 3200 Grand Ave. Des Moines, IA 50312, USA.
authors.forename: Brett M
authors.initials: BM
authors.lastname: Henderson
authors.forename: Christopher H
authors.initials: CH
authors.lastname: Hunt
authors.forename: Laurence J
authors.initials: LJ
authors.lastname: Eckel
authors.forename: Kara M
authors.initials: KM
authors.lastname: Schwartz
authors.forename: Felix E
authors.initials: FE
authors.lastname: Diehn
authors.forename: Bobbi S
authors.initials: BS
authors.lastname: Pritt
authors.forename: David J
authors.initials: DJ
authors.lastname: Schembri Wismayer
authors.forename: James A
authors.initials: JA
authors.lastname: Garrity