Mast cell activation syndrome
MONDO:0100004A clinically defined disease states with a largely unknown morphological background. Acute mast cell activation (MCA) is commonly seen in allergic reactions and often leads to the clinical signs and symptoms of anaphylaxis. Severe or even life‐threatening MCA may occur when the burden of mast cells is high and/or these cells are in an hyperactivated state. Mastocytosis may be associated with mast cell activation syndrome (MCAS).
Also known as: MACS, disorder of mast cell activation, mast cell activation disease
51 clinical trials for this condition and its sub-types.
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Can extra care after transplant help older patients live better?
Disease control TerminatedThis study tested two extra care programs—supportive palliative care and clinical management of other health issues—for older or frail patients who had a donor stem cell transplant. The goal was to see if these programs could improve quality of life and survival compared to stand…
Phase: PHASE2, PHASE3 • Sponsor: Fred Hutchinson Cancer Center • Aim: Disease control
Last updated Jun 27, 2026 08:10 UTC
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Pain relief drug trial for mast cell syndrome stalls early
Symptom relief TerminatedThis Phase 2 trial tested whether FSD201 tablets could reduce chronic pain in adults with mast cell activation syndrome. The study planned to enroll many participants but was terminated early with only 2 people. No results are available to show if the drug works or is safe.
Phase: PHASE2 • Sponsor: Quantum Biopharma • Aim: Symptom relief
Last updated Jun 27, 2026 12:23 UTC