• Living with mastocytosis

    How I learned that estrogen can affect SM symptoms

    Out of all the medications I have taken, a birth control pill was the most impactful, writes Kim Lepine.

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  • The latest news

    FDA accepts application for bezuclastinib in nonadvanced SM

    A decision on bezuclastinib in nonadvanced systemic mastocytosis is expected by December 30, 2026.

    Read more

  • Understanding mastocytosis

    Can you inherit systemic mastocytosis?

    Most cases of SM are linked to somatic mutations in the KIT gene.

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  • A companion for the SM journey

    The information, insights and support you need every step of the way

    Find what you are looking for no matter where you are on the SM journey. Get started today.

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SM basics

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