Section I Normal Variants
1. Persistent Primitive Trigeminal Artery
2. Arachnoid Granulations
3. Asymmetry of the Lateral Ventricles
4. Basal Ganglia/Dentate Nuclei Mineralization
5. Cavum Septum Pellucidum
6. Choroid Fissure Cyst
7. Empty Sella Configuration
8. High-Riding Jugular Bulb
9. Hyperostosis Frontalis Interna
10. Prominent Perivascular Space
11. Simple Pineal Cyst
Section II Intracranial Incidental Findings
12. Diffuse White Matter Hyperintensities
13. Brain Capillary Telangiectasias
14. Developmental Venous Anomaly
15. Cerebral Cavernous Malformations
16. Colloid Cyst
17. Arachnoid Cysts
18. Mega Cisterna Magna
19. Benign Enlargement of Subarachnoid Spaces
20. Pituitary Incidentaloma and Incidental Silent Macroadenoma
21. Pituitary Gland: Diffuse Enlargement
22. Incidental Glial Neoplasms
23. Incidental Meningioma
Section III Head and Neck Associated Incidental Findings
24. Head and Neck Related Incidental Findings
Section IV Spinal Incidental Findings
25. Os Odontoideum
26. Tarlov\'s Cyst
27. Approach to the Solitary Vertebral Lesion on Magnetic Resonance Imaging
28. Diffusely Abnormal Marrow Signal within the Vertebrae on MRI
29. Filum Terminale Lipoma
30. Ventriculus Terminalis
31. Prominent Central Canal
32. Low-Lying Conus
33. Incidental Solitary Sclerotic Bone Lesion
Section V Extraspinal Incidental Findings
34. Abdominal Aortic Aneurysm
35. Renal Mass
36. Renal Cyst
37. Thyroid Mass
38. Adrenal Mass
39. Retroperitoneal Lymph Nodes
40. Incidental Pelvic Mass
Section VI Artifacts That May Obscure Pathology and Simulate Disease Entities
41. Computed Tomography Artifacts
42. MRI Patient-Related Motion Artifacts
43. Magnetic Susceptibility Related Artifacts on MRI
44. MRI Technical and Sequence-Specific Artifacts