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Background
Neuroradiology is comprised of a vast breadth of pathologies. Practicing radiologists and in-training radiologists often use classic signs in neuroradiology to help narrow the differential diagnosis and identify the pathology.

Educational Goals / Teaching Points
In this case-based educational exhibit we will show the imaging findings of various signs in neuroradiology categorized into brain, spine, and head/neck signs. We will also discuss relevant clinical considerations, provide a framework to guide the differential, and outline follow-up recommendations.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
This exhibit presents cases of key signs in neuroradiology, including brain (empty delta sign, onion bulb sign, swirl sign, Mount Fuji sign, lemon sign, molar tooth sign, figure 8 sign, tigroid sign, tiger stripe sign, dawson fingers, caput medusa sign, worm bag sign, tram-track sign, banana cerebellum sign, cotton wool sign, the eye of the tiger sign, horseshoe sign, hot cross bun sign, hummingbird sign, ivy sign, white cerebellum sign, cord sign, pseudosubarachnoid hemorrhage sign, pulvinar sign, tau sign); spine (bamboo spine, Baastrup sign, corduroy sign, reverse hamburger bun sign (naked facet sign), scalpel sign, sugar coating sign, winking owl sign); head and neck (ice cream cone sign, optic nerve tram-track sign, thyroid inferno sign, broken heart sign, spinnaker sail sign, cerebrifom pattern of inverted papillomas, panda sign of sarcoidosis, target sign of neurofibroma); differential diagnoses for each sign, relevant clinical considerations, management/follow up recommendations for each underlying pathology associated with the sign.

Conclusion
After the reader has viewed the case-based exhibit, they will be able to recognize classic signs in neuroradiology and be able to effectively narrow their differential.