A Young Man with Cognitive Impairment and a Heart Condition

Area of Science:

• Neuroscience
• Genetics
• Cardiology

Background:

• A 43-year-old presented with progressive cognitive impairment, diagnosed as mild cognitive impairment (MCI).
• The patient had a family history of frontotemporal dementia and developed cardiomyopathy.
• Initial work-up suggested a neurodegenerative cause for the cognitive decline.

Discussion:

• Genetic screening revealed heterozygotic variants in PSEN1, APP, and MYBPC3.
• Mutations in PSEN1 and MYBPC3 were identified as pathogenic, causing both brain and cardiac amyloidosis.
• The APP variant's role in the patient's condition remains uncertain.

Key Insights:

• Identified a unique genetic profile involving multiple amyloid-related genes.
• Demonstrated a dual role of PSEN1 and MYBPC3 mutations in causing neurological and cardiac amyloidosis.
• Highlighted the complexity of diagnosing rare genetic disorders with overlapping symptoms.

Outlook:

• Further research is needed to clarify the pathogenicity of the APP variant.
• Investigating the interplay between these genetic variants and disease progression is crucial.
• This case underscores the importance of comprehensive genetic analysis in patients with unexplained cognitive and cardiac issues.