Q: My doctor thinks my mast cells are activating inappropriately and may be causing many of the symptoms I periodically have. Please tell me more about this condition. A: Mast cells are an important ...

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 range of other symptoms.

Depending on one's perspective, "mast cell activation syndrome (MCAS)" is either a relatively rare, narrowly defined severe allergic condition or a vastly under-recognized underlying cause of multiple ...

This scanning electron microscopy image captures the moment where degranulating mast cells (pseudo-colored in sepia) attract and start to incorporate living neutrophils (pseudo-colored in cyan), ...

Scientists have uncovered a surprising new pathway behind life-threatening food allergies. Instead of histamine, a different chemical called leukotrienes drives severe reactions in the gut. These ...