Presentation
Vague headaches. Otherwise well.
Patient Data
Age: 20 years
Gender: Female
From the case:
Normal brain (MRI)
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Normal appearance of a young person's brain on a 1.5T scanner other than borderline low-lying tonsils. Note, however, that McRae’s line (basion to the opisthion) needs to be measured A) in the midline and B) from the tip of the cortical bone - and not the fat-rich bone marrow. The tonsils are rounded (not peg-like) and, although no scale is present to effect a precise measurement, at most these tonsils are 2-4 mm below McRae's line and thus of dubious significance. Minor retroflexion of the odontoid process. No syrinx.
Case Discussion
Essentially normal MRI of the brain for reference. Borderline low-lying tonsils.
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