Acquired and Genetic Amyloid Neuropathies

Area of Science:

• Neurology
• Genetics
• Pathology

Background:

• Amyloidosis is a significant cause of polyneuropathy.
• It presents with diverse etiologies, including amyloid light chain (AL), transthyretin variant (ATTRv), wild-type transthyretin (wrATTR), gelsolin, and apolipoprotein A1 (ApoA-I) amyloidosis.
• AL and transthyretin amyloidosis are most common, while AGel and ApoA-I are rare and diagnostically challenging.

Purpose of the Study:

• To review the various etiologies of amyloidosis causing polyneuropathy.
• To highlight diagnostic challenges and emphasize the importance of timely diagnosis.
• To underscore the necessity of multidisciplinary collaboration for patient management.

Main Methods:

• Review of existing literature on amyloidosis etiologies and diagnostics.
• Discussion of diagnostic tools including genetic testing, biomarkers, and tissue biopsy with Congo red staining.
• Emphasis on the role of neurologists and multidisciplinary teams.

Main Results:

• Amyloidosis encompasses several distinct types, each with unique characteristics.
• Diagnostic delays persist despite advances, particularly for rarer forms.
• Accurate diagnosis relies on a combination of genetic, biomarker, and histopathological assessments.

Conclusions:

• Early and accurate diagnosis of amyloidosis is critical for effective treatment.
• Multidisciplinary collaboration is essential for optimizing patient care across all amyloidosis types.
• Continued research in biomarkers and diagnostic techniques is needed to overcome current challenges.