Mastocytosis: a comprehensive insight.

Area of Science:

• Hematology
• Immunology
• Dermatology

Background:

• Mastocytosis is a disorder of abnormal mast cell accumulation in tissues.
• Clinical manifestations result from mast cell mediators and distribution.
• The 2008 WHO classification defines seven categories of mastocytosis.

Purpose of the Study:

• To outline the diagnostic approach to mastocytosis, particularly in pediatric cases.
• To differentiate between cutaneous mastocytosis (CM) and systemic mastocytosis (SM).
• To discuss current and potential future treatment strategies.

Main Methods:

• Review of diagnostic criteria and classification systems (e.g., 2008 WHO).
• Emphasis on serum tryptase levels for diagnosis and staging.
• Consideration of bone marrow examination (BME) based on tryptase levels and age.

Main Results:

• Serum tryptase is crucial for diagnosing pediatric mastocytosis.
• Specific tryptase thresholds guide the need for BME in children.
• Adult-onset mastocytosis requires complete staging for systemic disease.

Conclusions:

• Diagnostic algorithms for mastocytosis vary by age and serum tryptase levels.
• Cutaneous mastocytosis is common in children, often resolving by puberty.
• Targeted therapies, such as kit inhibitors, show promise for future treatment.