Diagnosing Mitochondrial Disorder without Sophisticated Means

Area of Science:

• Neurology
• Genetics
• Cardiology

Background:

• Mitochondrial disorders (MIDs) are typically diagnosed through biochemical or genetic testing.
• Clinical presentation, family history, and syndromic phenotypes can also suggest MIDs.

Observation:

• A 74-year-old male with a history of hypertension, cardiomyopathy, diabetes, and polyneuropathy presented with worsening ptosis and ophthalmoparesis.
• Extensive investigations revealed additional comorbidities including hepatopathy, hyperlipidemia, and white matter lesions.
• The patient experienced asystole and died from acute myocardial infarction.

Findings:

• A detailed family history revealed a pattern suggestive of MIDs, including myopathy, neuropathy, and Parkinson syndrome across generations.
• Phenotypic variability was notable among affected family members.
• The patient's complex medical history and eventual death highlighted a potential association between MIDs and accelerated atherosclerosis.

Implications:

• Individual and family history are crucial for suspecting MIDs, complementing diagnostic testing.
• Recognizing phenotypic variability is essential for accurate diagnosis and management of MIDs.
• Mitochondrial disorders may be linked to an increased risk of atherosclerotic cardiovascular disease, leading to severe outcomes.