Thalassemia - hair on end sign
Known case of thalassemia major with dizziness and headache.
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Gross thickening of diploic space of the skull vault with no discrete masses.
No intracranial masses, hemorrhage or vascular thrombosis.
The 'hair on end' sign is always appreciated on lateral skull radiograph and CT. In this case, it is evident on MRI. As in the above case, it is related to thalassemia major.