No apparent link to humans?
Never met an obese person that had any kind of cancer, so this rings dissonant. Bad knees, bad feet, bad hips, sore backs, but cannot recall a single obese person with cancer.
Obesity is associated with increased risks of the following cancer types, and possibly others as well:
Esophagus, Pancreas, Colon and rectum, Breast (after menopause), Endometrium (lining of the uterus), Kidney, Thyroid, Gallbladder.
One study, using NCI Surveillance, Epidemiology, and End Results (SEER) data, estimated that in 2007 in the United States, about 34,000 new cases of cancer in men (4 percent) and 50,500 in women (7 percent) were due to obesity. The percentage of cases attributed to obesity varied widely for different cancer types but was as high as 40 percent for some cancers, particularly endometrial cancer and esophageal adenocarcinoma.
The reason you were likely unaware of this was because these are internal cancers that are likely in an advanced stage when they are first detected. On top of that, cancer and chemotherapy are a major weight loss program. I knew an obese woman whose cancer, though caught early, was terminal, and in six months she went from fat to “concentration camp”.
Her life was probably extended by three months by smoking marijuana, that permitted her to eat without nausea.