Toddler who fell out of the top of his bunk bed 3 days ago and is now seizing

CT and MRI of cavernous malformation
Axial (above left) and coronal (above right) CT without contrast of the brain shows a large round high density lesion in the left middle cranial fossa. Axial T1 MRI without contrast of the brain (below left) shows the lesion to have mixed signal intensity while the axial gradient echo MRI (below right) shows a low signal intensity ring around the lesion representing hemosiderin deposition.

The diagnosis was cavernous malformation with subacute and chronic hemorrhage in the left temporal lobe.