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Post: Cannabis Linked to Bulging Eyes in Graves’ Disease

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Cannabis Linked to Bulging Eyes in Graves' Disease
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TOPLINE:

Among patients with autoimmune hyperthyroidism, those who use cannabis are 1.9 times more likely to develop exophthalmos — eyes that appear to bulge from the face — within 1 year of diagnosis, than those who do not use the drug. However, the added risk may wane over time. METHODOLOGY:

Researchers analyzed data from TriNetX, an electronic health record platform, for more than 36,000 patients with autoimmune hyperthyroidism between 2003 and 2023.

The dataset included 783 cannabis users, 17,310 nicotine users, and 18,093 controls who did not use either substance.

Primary outcomes included presentations of thyroid eye disease (TED) and the use of treatments for the condition, such as teprotumumab, steroids, eyelid retraction repair, tarsorrhaphy, strabismus surgery, or orbital decompression.

The investigators used propensity matching to control for characteristics such as age, sex, race, and prior thyroidectomy or radio ablation.

TAKEAWAY:

The incidence of exophthalmos at 1 year was 4.1% among nicotine users, 4.1% among cannabis users, and 2.2% among controls.

Cannabis users were 1.9 times more likely than controls to develop exophthalmos within 1 year ( P = .03). At 2 years, the researchers identified a trend toward more TED in cannabis users than in controls, but the difference was no longer statistically significant. Cannabis users were about 2.5 times more likely than controls to be prescribed steroids throughout the 2-year follow-up period. IN PRACTICE: "These findings altogether suggest that cannabis usage may be associated with earlier progression or increased short-term severity of TED symptoms," the authors of the study wrote. The mechanisms may be like those for cigarette smoking, and could include inflammation and vascular congestion, they added. SOURCE: The study was conducted by Amanda M. Zong and Anne Barmettler, MD, with Albert Einstein College of Medicine in New York City. It was published online on August 28, 2024, in Ophthalmic Plastic and Reconstructive Surgery . LIMITATIONS: The number of cannabis users was relatively small and included only patients who had received a diagnosis of a cannabis usage disorder prior to the diagnosis of autoimmune hyperthyroidism, the researchers noted. TED lacks […]

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