Stroke-like episode involving a cerebral artery in a patient with MELAS

Area of Science:

• Neurology
• Vascular Neurology
• Mitochondrial Diseases

Background:

• Mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes (MELAS) is a rare genetic disorder.
• Stroke-like episodes are a hallmark clinical manifestation of MELAS syndrome.
• The underlying pathophysiology of MELAS-related stroke-like episodes is not fully understood, but vascular abnormalities are suspected.

Observation:

• A patient diagnosed with MELAS presented with a stroke-like episode.
• Magnetic imaging angiography revealed segmental vascular narrowing in the right posterior cerebral artery during the acute phase.
• Follow-up neuroimaging demonstrated significant improvement in the vascular stenosis.

Findings:

• The observed vascular narrowing in a major cerebral artery during a MELAS stroke-like episode is a significant finding.
• The transient nature of the stenosis suggests a dynamic vascular process.
• This case highlights the potential involvement of large cerebral arteries in MELAS.

Implications:

• Major cerebral artery involvement should be considered in the differential diagnosis of stroke-like episodes in MELAS patients.
• Understanding these vascular dynamics may lead to improved diagnostic and therapeutic strategies for MELAS.
• Further research is warranted to elucidate the mechanisms of cerebral vascular involvement in MELAS.