Abstract
A 58-year-old man presented with a pure sensory deficit involving the spinothalamic modalities in the right half of the body excluding the face. Magnetic resonance imaging (MRI) demonstrated a lacune in the left marginal portion of the medulla oblongata, corresponding to the location of the spinothalamic tract, although there was no evidence for ischemic lesion on serial computed tomograms. The usefulness of MRI in the topographic delineation of lacunar infarcts in the posterior fossa is stressed.
