Esthesioneuroblastoma. Gadolinium-enhanced sagittal T1WI showing a heterogeneously enhancing mass traversing the cribriform lamina, with intracranial and extracranial components (arrows). Corresponding DWI, T2WI, and FLAIR sequence (not presented) showing low apparent diffusion coefficients in solid components, right olfactory bulb involvement, and vasogenic edema in the adjacent right frontal lobe.