MELAS: A Complex and Challenging Diagnosis.

Area of Science:

• Neurology
• Genetics
• Mitochondrial Diseases

Background:

• Mitochondrial encephalopathy, lactic acidosis and stroke-like episodes (MELAS) is a rare, maternally inherited mitochondrial disease.
• It primarily affects the nervous system and muscles, presenting complex diagnostic challenges.

Observation:

• This case report details a 16-year-old male with clinical and radiological findings suggestive of MELAS syndrome.
• The patient exhibited stroke-like lesions, a common but often misdiagnosed feature of MELAS.
• Recurrent episodes in different brain locations were observed, characteristic of MELAS.

Findings:

• Distinguishing MELAS from ischemic stroke is difficult due to similar clinical and radiological presentations.
• Advanced MRI techniques, including DWI, SWI, and MR spectroscopy, are crucial for accurate diagnosis.
• Key differentiating factors include patient age, lesion location, and vascular territory distribution.

Implications:

• Early and accurate diagnosis of MELAS is critical for appropriate management and genetic counseling.
• Increased awareness of MELAS can prevent misdiagnosis as common ischemic stroke.
• Understanding MELAS's unique imaging features aids in differentiating it from other neurological disorders.