Episodic Nature and Diagnostic Criteria of Mast Cell Activation Syndrome (MCAS)

Definition and Core Diagnostic Features

Diagnostic Pitfalls and Differential Considerations

Management Implications for Confirmed MCAS

All facts are derived from peer‑reviewed sources cited above and reflect the AAAAI guideline recommendations.

Acute Mast Cell Activation Syndrome Episodes Can Cause Transient Dysphagia

Clinical Presentation

• Patients experiencing an acute mast cell activation syndrome (MCAS) episode may develop swallowing difficulty (dysphagia) as part of a multi‑system anaphylactic reaction that also involves the gastrointestinal tract, skin, cardiovascular, and respiratory systems; the dysphagia is episodic rather than continuous and occurs together with other systemic symptoms. 4