Oblique radiograph of the foot (left) shows a lesion in the base of the first metatarsal which has an oval radiolucent center with surrounding reactive sclerosis. Sagittal T2 MRI of the foot (above right) shows an oval hyperintense lesion surrounded by a very low signal intensity rim and hyperintense marrow edema throughout the first metatarsal. Sagittal T1 MRI with contrast (below right) shows rim enhancement (penumbra) around the lesion.
