Neuroferritinopathy: Pathophysiology, Presentation, Differential Diagnoses and Management

Area of Science:

• Neurology
• Genetics
• Neurodegenerative Diseases

Background:

• Neuroferritinopathy (NF) is a rare autosomal dominant disorder.
• Caused by mutations in the ferritin light chain 1 (FTL1) gene.
• Characterized by excessive brain iron accumulation, primarily in the basal ganglia.

Purpose of the Study:

• To review the pathophysiology, clinical presentation, differential diagnoses, and management of NF.
• To highlight the relationship between FTL1 mutations and clinical phenotypes.
• To guide clinicians in diagnosing NF.

Main Methods:

• Literature search of PubMed for English-language articles.
• Keywords used: iron metabolism, neurodegeneration with brain iron accumulation, NF.
• Review focused on pathophysiology, clinical presentation, differential diagnoses, and management.

Main Results:

• Nine FTL1 mutations identified in 90 patients globally; 460InsA is most common.
• Chorea and dystonia are the most frequent presenting symptoms.
• Clinical features vary depending on the specific genetic mutation.

Conclusions:

• NF should be suspected in progressive movement disorders with brain iron deposition, especially if other genetic tests are negative.
• Diagnosis requires considering clinical, imaging, and genetic findings.
• Symptomatic treatment offers variable success due to lack of disease-specific therapies.