MCAS involves mast cells releasing too many chemical mediators, causing multi-system allergic and inflammatory reactions.
✦ AI summary
Here's what these sources cover on Mast Cell Activation Syndrome (MCAS) and related mast cell conditions:
MCAS often shows up alongside other conditions rather than as an isolated diagnosis. It's frequently discussed as a complication of Ehlers-Danlos Syndrome (EDS), alongside joint problems, chronic pain, fatigue, and gut issues [1], and a patient survey found people with hypermobile EDS/hypermobility spectrum disorders who also have MCAS (or POTS or hip dysplasia) report significant disability across many areas of life, with more than half saying their symptoms weren't well managed [8]. There's also a documented connection with dysautonomia: among patients with POTS and related orthostatic intolerance syndromes, hives (a possible sign of mast cell activation) were common (over 40% reported them sometimes) and linked to greater overall symptom burden, including pain and tingling, though the researchers note the exact role of mast cell activation and whether mast-cell-targeted treatments would help still needs more study [3]. Separately, one erratum notes a now-withdrawn duplicate article that had explored MCAS in relation to angioedema and COVID-19 deaths, so
This is an AI-generated summary of the sources below — not medical advice. Always talk to a doctor or pharmacist about your own situation.
Complications and Management of Ehlers-Danlos Syndromes and Hypermobility Spectrum Disorders: A Literature Review.
Ehlers-Danlos syndrome (EDS) is a group of inherited disorders affecting collagen and extracellular matrix proteins, which can cause skin hyperelasticity, joint hypermobility, atrophic scarring, and blood vessel fragility. Complications include joint dislocation, chronic pain, fatigue, functional ga…
Hives in autonomic disorders: a cutaneous marker of a distinct symptom phenotype.
Postural Orthostatic Tachycardia Syndrome (POTS) and Neurally-Mediated Hypotension (NMH) are heterogeneous syndromes characterized by dysautonomia and multisystem symptoms. Mast cell activation, often manifesting as hives, has been proposed as a contributing mechanism, but its prevalence and clinica…
Causal association and shared mechanisms between Graves' disease and prostate cancer: insights from Mendelian randomization, machine learning, and comprehensive bioinformatics.
Observational studies link hyperthyroidism to increased prostate cancer (PCa) risk, but causality and mechanisms remain unclear. Graves' disease (GD), the primary cause of hyperthyroidism, involves chronic immune dysregulation that may influence PCa through shared immune pathways. We performed bidir…
Glehnia littoralis and imperatorin attenuate allergic airway inflammation via mast cell stabilization and transcriptome-defined suppression of FcεRI/TLR-MAPK/NF-κB signaling.
Allergic airway inflammation is driven by mast cell activation and IgE-FcεRI signaling. Current pharmacological treatments often present limited efficacy or long-term adverse effects. Glehnia littoralis Fr. Schmidt ex Miq. (GL) is a traditional medicinal herb used for respiratory ailments, but its a…
Activated mast cells (MCs) are crucial effectors in the initiation and progression of psoriasis by secreting inflammatory mediators. The MC activation mediated by Mas-related G-protein-coupled receptor X2 (MrgprX2) has been implicated in psoriasis progression. However, the therapeutic strategies tar…
Erratum: WITHDRAWAL - Administrative Duplicate Publication: Expanding the Diagnostic Lens: Mast Cell Activation Syndromes and the Hidden Spectrum of Angioedema Associated Mortality in COVID-19.
[This corrects the article DOI: 10.1177/19253621251409437.][This corrects the article DOI: 10.1177/19253621251409454.].
Systemic Mastocytosis in Adults: 2026 Update on Diagnosis, Risk Stratification and Management.
Systemic mastocytosis (SM) results from clonal proliferation of mast cells (MC) in extra-cutaneous organs. The major criterion is the presence of multifocal MC clusters in the bone marrow and/or extracutaneous organs. Minor diagnostic criteria include elevated serum tryptase level, MC CD25/CD2/CD30…
Hypermobility spectrum disorders and hypermobile Ehlers-Danlos syndrome: patient experiences, disability and implications for rehabilitation.
The diagnosis and management of hypermobility spectrum disorders and hypermobile Ehlers-Danlos syndrome (HSD/hEDS) are a healthcare challenge because of the wide array of symptoms, lack of diagnostic biomarkers, and evolving management guidelines. This study aimed to describe patient experiences, di…