PMC3604869_01
T2*-weighted image. The arrow indicates the presence of a microbleed in the left pons.
crn-0005-0031-g01.jpg
PMC3604869_01_crn-0005-0031-g01.jpg
F1
T2*-weighted imaging, a dark focus of increased susceptibility ('microbleed') was visible in the left pons, in the area of her described symptoms (fig. 1). The symptoms fit well with the location because of the proximity to the corticospinal tract (lesion of which causes contralateral weakness) and the medial longitudinal fasciculus (lesion of which causes double vision due to internuclear ophthalmoplegia.) Dizziness is a rather unspecific symptom but often seen with lesions in the vertebrobasilar circulation.
Unweighted image (b = 0) in the diffusion-weighted series. In effect it is a T2-weighted image. The arrow points to the bright rim (edema) around the lesion, indicating that the lesion is acute.
crn-0005-0031-g02.jpg
PMC3604869_01_crn-0005-0031-g02.jpg
F2
On the B-zero diffusion series, the microbleed revealed a rim of T2 hyperintensity consistent with edema and an acute timing of the lesion (fig. 2).