title: False-positive magnetic resonance imaging of a metastatic carcinoma simulating a malignant melanoma.
abstract: Previous studies have shown the value of magnetic resonance imaging (MRI) in the diagnosis of malignant melanoma of the choroid. We describe the case of a patient with a choroidal mass whose MRI study was characteristic of malignant melanoma. Subsequently the eye was enucleated. However, on histopathologic examination, the mass was a metastatic carcinoma to the choroid. This false-positive study makes us question the value of MRI in the diagnosis of malignant melanoma of the choroid.
authors.affiliation: Ophthalmology Department, Ohio State University, Columbus 43210.
authors.forename: F H
authors.initials: FH
authors.lastname: Davidorf
authors.forename: R B
authors.initials: RB
authors.lastname: Chambers
authors.forename: P
authors.initials: P
authors.lastname: Gresak
mesh_terms: D000368:Aged; D001943:Breast Neoplasms; D002277:Carcinoma / Q000175:diagnosis / Q000556:secondary*; D002830:Choroid Neoplasms / Q000175:diagnosis* / Q000556:secondary*; D015353:Eye Enucleation; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008545:Melanoma / Q000175:diagnosis*; D011237:Predictive Value of Tests