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Esthesioneuroblastoma. A 25-year-old male presented with headaches, anosmia, and seizures. (A–C) Coronal, sagittal, and axial (respectively) T1-weighted MRIs with gadolinium demonstrate a large enhancing mass extending down into the ethmoidal sinuses and nasal cavity and extending up causing mass effect on both frontal lobes. The large mass occupies the entire anterior cranial base. Used with permission from Barrow Neurological Institute.
