Translations may contain older or less detailed information than the original German page!
Welcome to the site of mastzellaktivierung.info! This information platform is a comprehensive body of knowledge on the disease patterns and symptoms of systemic mast cell activation disorders (mast cell activation syndrome MCAS, systemic mastocytosis SM) and its many causes and manifestations. Please be patient until all pages have been translated into English. It will take quite a while, but you can accelerate it: Please make a donation or become a member!
Our summary (outline) informs newcomers what it is all about here.
Please also thoroughly read the side notes before you start reading the remaining pages!
We are continuously expanding, updating and adjusting this website to reflect the latest state of information. It is well worth checking it on a regular basis. Our members are kept informed by a newsletter (English translation available). Join us to stay up to date about important news! On the page introduction > sitemap by date you will find the pages that have been recently updated. If you fear you may lose yourself in a hypertext document crowded with references, you also have the option of reading our pages linearly like a book. To do so, please follow our guided tour (button at the bottom end of every page).
Guided tour: Go to
introduction > outline