Neurofibromatoses: part 1 - diagnosis and differential diagnosis

Area of Science:

• Genetics
• Oncology
• Neurology

Background:

• Neurofibromatoses (NF) encompass NF1, NF2, and schwannomatosis, characterized by neural tumors and cutaneous signs.
• These genetic disorders affect approximately 80,000 individuals in Brazil, impacting quality of life.
• Advancements in NF knowledge improve clinical management and reduce morbidity.

Purpose of the Study:

• To provide comprehensive, step-by-step guidelines for the differential diagnosis of neurofibromatoses.
• To aid healthcare professionals in distinguishing NF from other conditions and identifying major complications.

Main Methods:

• Review of clinical manifestations and diagnostic criteria for NF1, NF2, and schwannomatosis.
• Emphasis on characteristic neural and cutaneous signs.
• Consideration of phenotype variability, disease progression, and multi-organ involvement.

Main Results:

• Established a structured approach for differentiating NF types.
• Highlighted the importance of recognizing common NF signs and symptoms.
• Identified key challenges in NF diagnosis due to variable presentations.

Conclusions:

• Accurate differential diagnosis is crucial for effective NF management.
• Specialist support is often necessary due to NF's complexity and unpredictable nature.
• This guideline serves as a foundational tool for Part 2 on clinical management.