Acute medial medullary infarct

Abnormal hyperintensity is noted in the right medial medulla on both T2- and diffusion-weighted scans, which corresponds to vasogenic and cytotoxic edema, respectively. The medial medulla is most often described as being supplied by the anterior spinal artery. The medial medullary syndrome, also known as Dejerine syndrome, is caused by infarction of this region. It consists ipsilateral tongue weakness, contralateral limb weakness, and contralateral loss of touch, proprioception, and vibration sense (due to involvement of the hypoglossal nerve, corticospinal tract, and medial leminiscus).

Acute medial medullary infarct

Part of the on-line supplement to Neuroradiology – The Essentials with MR and CT (© 2015)