title: Teaching NeuroImages: brain mass with hilar adenopathy: the importance of histologic diagnosis.
abstract: A 30-year-old man presented with weeks of progressive headaches, imbalance, and aphasia. Brain MRI revealed an enhancing left frontal mass (figure 1, A and B). Chest imaging revealed mediastinal and hilar adenopathy (figure 1, C and D). Metastatic cancer was initially suspected, but pulmonary lymph node aspiration revealed sarcoidosis (figure 2A). Subsequent brain biopsy revealed glioblastoma (figure 2B).
authors.affiliation: From the Division of Neuro-Oncology (J.T.J., S.R.P.), Department of Neurology (H.-S.Y., D.N.), Massachusetts General Hospital, Boston.
authors.forename: Justin T
authors.initials: JT
authors.lastname: Jordan
authors.forename: Hyun-Sik
authors.initials: HS
authors.lastname: Yang
authors.forename: Derek
authors.initials: D
authors.lastname: Narendra
authors.forename: Scott R
authors.initials: SR
authors.lastname: Plotkin
mesh_terms: D000328:Adult; D001927:Brain Diseases / Q000150:complications* / Q000473:pathology; D006801:Humans; D008168:Lung / Q000473:pathology; D008198:Lymph Nodes / Q000473:pathology*; D008206:Lymphatic Diseases / Q000150:complications* / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008297:Male