Study: Daily marijuana use linked to increased rates of head and neck cancer

The study did not show an association between occasional marijuana use and certain cancers.

Gillian Neff and Rose Shannon

Aug 11, 2024, 2:45 PM

Updated 29 days ago

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A new study found that people who inhale marijuana smoke daily have a three to five times greater chance of being diagnosed with head and neck cancers.
The study did not show an association between occasional marijuana use and certain cancers.
Researchers at the Keck School of Medicine at the University of Southern California analyzed millions of medical records focusing on cannabis-use disorder. The disorder is used to describe people who use the drug daily, develop a high tolerance and continue to use it even when it results in health problems for them.
Doctors told News 12 that marijuana smoke contains many of the same toxins, irritants and carcinogens as cigarette smoke.
"The presence of high levels of carcinogens creates protein abnormalities in the cell, what we call neo antigens and the body wants to react to that because they look foreign," says Dr. Barry Boyd of Greenwich Hospital.
Boyd says various factors can lead to head and neck cancer including some strains of human pappiloma virus (HPV). Receiving the HPV vaccine along with not smoking are two ways to prevent those types of cancer.
Earlier this year, another study showed smoking, vaping or ingesting edible marijuana daily is liked to a 25% higher risk of heart attack and a 42% high risk of a stroke.