title: Undetected intraocular metallic foreign body causing hyphema in a patient undergoing MRI: a rare occurrence demonstrating the limitations of pre-MRI safety screening.
abstract: The case reported is of a 47-year-old man with an undetected ferromagnetic metallic intraocular foreign body in the right eye who underwent elective MR examinations for chronic neck and low back pain. The patient underwent the MR scans and subsequently developed blurred vision in his right eye caused by a hyphema associated with an anterior chamber metallic foreign body. Case reports of orbital injuries in patients with intraocular metallic foreign bodies undergoing MRI are rare, with only one prior report in the radiology literature. While the incidence of intraocular foreign bodies causing injury in patients undergoing MRI is likely rare even among patients with foreign bodies, this case demonstrates that complications from an IMFB can potentially have a subtle presentation. Our case also illustrates potential limitations of pre-MRI safety questionnaires, particularly pertaining to a patient's understanding of the thoroughness of foreign body removal.
authors.affiliation: Department of Diagnostic Radiology and Medical Imaging, University of Virginia School of Medicine, Charlottesville, VA.
authors.forename: David A
authors.initials: DA
authors.lastname: Lawrence
authors.affiliation: Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA.
authors.forename: Adam T
authors.initials: AT
authors.lastname: Lipman
authors.affiliation: University of Virginia School of Medicine, Charlottesville, VA.
authors.forename: Sumeet K
authors.initials: SK
authors.lastname: Gupta
authors.affiliation: Department of Diagnostic Radiology and Medical Imaging, University of Virginia School of Medicine, Charlottesville, VA. Electronic address: NCN5T@hscmail.mcc.virginia.edu.
authors.forename: Nicholas C
authors.initials: NC
authors.lastname: Nacey
mesh_terms: D059350:Chronic Pain / Q000473:pathology; D005131:Eye Injuries / Q000503:physiopathology; D005547:Foreign Bodies; D006801:Humans; D006988:Hyphema / Q000503:physiopathology*; D017116:Low Back Pain / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008670:Metals / Q000009:adverse effects*; D008875:Middle Aged; D019547:Neck Pain / Q000473:pathology; D061214:Patient Safety; D011795:Surveys and Questionnaires; D014785:Vision, Ocular
chemical_list: D008670:Metals
keywords: Hyphema; Intraorbital metallic foreign body; MRI safety; MRI screening questionnaire