3  Hereditary alpha tryptasemia (HαT)

3.1 Testing

  • Testing for 3017399 (ARUP) TPSAB1 Copy Number Analysis by ddPCR. Here is the link here

3.2 Incidence

  • ~6% of caucasians of HAT
  • Autosomal dominant
  • They have increased allergies
  • ~15% of SM have HAT
  • The frequency of HAT in MC disorders varies according to the diagnostic subtype of the disease.
  • HAT does not imply a higher risk (and severity) of anaphylaxis in mastocytosis patients in whom anaphylaxis is not part of the presenting symptoms of the disease. González-de-Olano et al. (2023)