Mast cell activation syndrome (MCAS) is when your mast cells overreact with no known trigger. It causes severe symptoms and can lead to life-threatening anaphylaxis.

May 27, 2024 · Mast cell activation syndrome is a condition that causes mast cells to release an inappropriate amount of chemicals into your body. This causes allergy symptoms and a wide …

Mast cell activation syndrome can be categorized into three subclasses depending on the trigger which "activates" the degranulation of cells. In primary MCAS, researchers theorize that the …

MCAS is a condition in which the patient experiences repeated episodes of the symptoms of anaphylaxis – allergic symptoms such as hives, swelling, low blood pressure, difficulty …

MCAS is a rare disease that is mostly diagnosed based on clinical symptoms. Here, we summarize recent developments about this disease, which is rapidly increasing in the …

Nov 3, 2025 · Mast cell activation syndrome (MCAS) is a disorder in which mast cells, a normal type of cell found in your immune system, release excessive amounts of histamines and other …

Apr 1, 2025 · MCAS is part of a spectrum of mast cell disorders involving abnormal function, non-clonal proliferation, accumulation, or activation of mast cells. It results in a wide range of …

Mar 31, 2025 · What is mast cell activation syndrome? Read on to learn more about the condition, including its causes, symptoms, and treatment options.

Feb 27, 2025 · Mast cells are immune cells found throughout the body, particularly in the skin, respiratory tract, gastrointestinal tract, and blood vessels. They are responsible for immune …

Mast cell activation syndrome (MCAS) causes a person to have repeated severe allergy symptoms affecting several body systems. In MCAS, mast cells mistakenly release too many …