In some cancers, excess bodyweight during early adulthood could be a more important influence on cancer risk than weight gain in later life, research has found.
Pancreatic cancer cases rose by 4.34 per cent a year among 25 to 29-year-olds over the last two decades.
It's not possible to definitively attribute the recent cancer increases to obesity - but the new report notes that the upticks in cancer for young people coincided with a doubling in rates of childhood and adolescent obesity between 1980 and 2014, making weight a likely contributor.More news: Bo Peep And Woody Reunite In New Toy Story 4 Teaser Trailer
Healthcare providers should be vigilant about screening for and helping patients try to prevent obesity, since the consequences of climbing cancer rates could threaten decades of public health progress, the authors say.
This is because fat cells are active in the body, releasing hormones and electrical signals which encourage cells to divide and grow.
Increasing obesity rates among young people mean that the risk of cancer is rising for millennials, according to an American study.More news: China opposes USA withdrawal from INF
From 1999-2000 to 2015-2016, the prevalence of obesity in the USA population increased from 20.5 percent to 39.5, according to the Centers for Disease Control and Prevention. Rates of some of these same cancers also increased among older adults, but the increases were much smaller, the researchers said. In 2016, the International Agency for Research on Cancer (a branch of the World Health Organization) published a report linking obesity to a higher risk of 12 cancers: Colorectal, esophageal, gallbladder, gastric cardia (a type of stomach cancer), kidney, liver and bile duct, multiple myeloma (a type of bone marrow cancer), pancreatic and thyroid cancer; and, in women, endometrial, breast and ovarian cancer. The numbers suggest that millennials have roughly twice the risk of developing these cancers as baby boomers did at the same age. Separating data into five-year age cohorts, they found that incidence of six cancers - colorectal, endometrial, multiple myeloma, gall bladder, kidney and pancreas - out of the 12 related to obesity in adults between the ages of 25 and 49 increased significantly between 1995 to 2014.
Dr Jemal said: 'Over the past few decades, death rates have been in decline for most cancers, but in the future obesity could reverse that progress, barring any interventions.
Because the database does not include details on obesity and other risk factors nor mode of detection for the cancer diagnosis statistics, the results do not provide sufficient information to determine a causal relationship, according to the study.More news: ‘Young and the Restless’ star Kristoff St. John found dead at 52