What are "B" findings indicative of a high systemic mastocytosis burden in patients?

Updated: Sep 16, 2020
  • Author: Jacquiline Habashy, DO, MSc; Chief Editor: Dirk M Elston, MD  more...
  • Print

Consultation with a hematologist may be necessary for a bone marrow biopsy and staging. The WHO classification of systemic mastocytosis mandates a number of staging investigations to define the exact subtype of disease. Identification of "B" findings alone, such as the following, is indicative of a high systemic mastocytosis burden:

  • Greater than 30% bone marrow mastocytosis burden

  • Serum tryptase level greater than 200 ng/mL

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!