Detection of Clonal Mast Cell Disorders Among Patients With Exercise-induced Anaphylaxis
Trial Snapshot
- Phase
- Not Applicable
- Sponsor
- Brigham and Women's Hospital
- Enrollment
- 10
- Locations
- 1
- Primary Endpoint
- Number of participants with presence of clonal abnormalities in the bone marrow specimen
Study Overview
Brief Summary
Anaphylaxis is a serious allergic reaction that develops rapidly and can cause death. Some patients experience anaphylaxis is association with exercise, a disorder called exercise-induced anaphylaxis. A subset of patients with unexplained anaphylaxis, especially those with hypotension during the anaphylactic episodes, have been shown to have abnormal, clonal populations of a certain cell type, mast cells, in the bone marrow. This has been described in at least one patient with exercise-induced anaphylaxis. The investigators would like review the findings in a group of patients with exercise-induced anaphylaxis who have undergone evaluation for the presence of abnormal, clonal mast cells.
Study Design
- Study Type
- Observational
- Observational Model
- Cohort
- Time Perspective
- Retrospective
Eligibility Criteria
- Ages
- 21 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Anaphylaxis in association with exercise on at least two occasions
- •During anaphylactic reaction, the subject must have experienced one or more of the following: flushing, hypotension, lack of urticaria
Exclusion Criteria
- •Pregnancy
Outcomes
Primary Outcomes
Number of participants with presence of clonal abnormalities in the bone marrow specimen
Time Frame: Baseline
Presence of clonal mast cells in bone marrow as assessed by D816V c-kit mutation or CD25 will be recorded for each participant. The data will be reported as the number of participant with exercise induced anaphylaxis carrying these clonal mast cells in this observational study. Presence of mast cells will be correlated with clinical parameters such as symptoms experienced during anapylaxis.
Secondary Outcomes
No secondary outcomes reported