Dorsal midbrain syndrome from a ring-enhancing lesion.
A ring-enhancing lesion is an uncommon cause of a dorsal midbrain syndrome. Here, we describe the case of a 60-year-old man with eye movement and pupillary findings consistent with dorsal midbrain syndrome, and in whom neuroimaging showed a single ring-enhancing lesion in the right midbrain and thalamus. Further investigation revealed a longstanding right groin mass which proved to be a malignant melanoma. His intracranial lesion was presumed to be a metastatic lesion, and treated with stereotactic radiosurgery. We report the patient's clinical course, and discuss the diagnosis and management of the solitary midbrain lesion.
Department of Ophthalmology, Massachusetts Eye & Ear Infirmary, Harvard Medical School, Boston, MA 02114, USA. glenn_yiu@meei.harvard.edu
Glenn
G
Yiu
Simmons
S
Lessell
D001927:Brain Diseases / Q000209:etiology; D001932:Brain Neoplasms / Q000556:secondary*; D017809:Fatal Outcome; D006119:Groin; D006801:Humans; D008297:Male; D008545:Melanoma / Q000473:pathology / Q000556:secondary*; D008636:Mesencephalon; D008875:Middle Aged; D015835:Ocular Motility Disorders / Q000209:etiology*; D011681:Pupil Disorders / Q000209:etiology*; D013577:Syndrome; D013788:Thalamus; D014057:Tomography, X-Ray Computed