What causes EGPA (Churg-Strauss syndrome)?

Updated: Dec 24, 2018
  • Author: Spencer T Lowe, MD; Chief Editor: Herbert S Diamond, MD  more...
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Causes of EGPA are unknown. [10]  EGPA is possibly an allergic or autoimmune reaction to an environmental agent or drug.

Several case reports have described drug-induced forms of EGPA. Mesalazine-induced EGPA has been reported in a patient with Crohn disease and sclerosing cholangitis. [22] Publications have addressed the association between propylthiouracil, methimazole, and vasculitides, including EGPA. One report is available on the association of freebase cocaine and EGPA. [23]

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