Christine McVie's cause of death last year was a massive stroke.
The Blast says her death certificate stated secondary cause, which was an aggressive form of cancer.
According to the National Institute of Health, it was a "metastatic tumor for which the site of origin is not suggested by a thorough history, physical examination, chest x-ray studies, routine blood and urine studies, and histologic evaluation."
She also had atrial fibrillation, also known as AFib, which is "the most common type of treated heart arrhythmia. An arrhythmia is when the heart beats too slowly, too fast, or in an irregular way."
In June of last year, she told Rolling Stone she had scoliosis and was trying to "get my back better and get myself into decent shape again."
Christine McVie was 79 when she passed on November 30th, 2022.
This video is from her solo concert in 1983! Listen to KBCO LIVE here.