title: Hemorrhagic brain metastases with high signal intensity on diffusion-weighted MR images. A case report.
abstract: Diffusion-weighted MR imaging has been applicable to the differential diagnosis of abscesses and necrotic or cystic brain tumors. However, restricted water diffusion is not necessarily specific for brain abscess. We describe ring-enhancing metastases of lung carcinoma characterized by high signal intensity on diffusion-weighted MR images. The signal pattern probably reflected intralesional hemorrhage. The present report adds to the growing literature regarding the differential diagnosis of ring-enhancing brain lesions.
authors.affiliation: Department of Radiology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Mori
authors.forename: O
authors.initials: O
authors.lastname: Abe
authors.forename: S
authors.initials: S
authors.lastname: Aoki
authors.forename: T
authors.initials: T
authors.lastname: Masumoto
authors.forename: T
authors.initials: T
authors.lastname: Yoshikawa
authors.forename: A
authors.initials: A
authors.lastname: Kunimatsu
authors.forename: N
authors.initials: N
authors.lastname: Hayashi
authors.forename: K
authors.initials: K
authors.lastname: Ohtomo
mesh_terms: D001922:Brain Abscess / Q000175:diagnosis; D001932:Brain Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000556:secondary*; D003937:Diagnosis, Differential; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006801:Humans; D020300:Intracranial Hemorrhages / Q000175:diagnosis* / Q000209:etiology; D008175:Lung Neoplasms / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008875:Middle Aged