[Medial medullary infarction demonstrated by MRI]

Area of Science:

• Neurology
• Neuroradiology

Background:

• Medial medullary infarction is a rare cerebrovascular event.
• Clinical presentation can vary, often lacking classic signs like tongue paresis.

Observation:

• A 67-year-old woman presented with contralateral hemiplegia and impaired deep sensation, but no tongue motor deficits.
• Magnetic resonance imaging (MRI) confirmed a lesion in the medial medulla oblongata.

Findings:

• Review of 17 prior cases revealed that the triad of medial medullary infarction, contralateral hemiparesis, deep sensory disturbance, and ipsilateral hypoglossal paresis is uncommon.
• Lesion location is key: upper medullary infarctions (vertebral artery related) have a good prognosis, while lower medullary infarctions (anterior spinal artery related) have a poor prognosis.

Implications:

• Accurate lesion detection and localization via MRI are essential for diagnosing medial medullary infarction.
• MRI-based localization significantly aids in predicting patient outcomes and guiding clinical management.