Increased cancer risk of people with type 2 diabetes

May 21, 2010

Cancer and diabetes - are risk factors the same for these two diseases? Or does diabetes cause processes in the body which promote the onset or growth of cancer? It is still unclear why diabetics have a higher rate of cancer than people who are not affected by this metabolic disorder.

In order to precisely identify the types of cancer in which plays a role, Kari Hemminki of DKFZ collaborated with colleagues in Sweden and the United States to carry out the largest study ever on cancer risks of people with type 2 diabetes. The study included 125,126 Swedish citizens who had been hospitalized due to problems associated with type 2 diabetes. The epidemiologists compared the cancer incidence in these patients with that of the general population in Sweden.

The scale of the study also made it possible, for the first time, to quantify correlations between diabetes and less common types of cancer. The researchers discovered that people with type 2 diabetes have an increased risk of developing 24 of the types of cancer studied. The most significant risk elevation was established for pancreatic and liver cell cancers. The rate of these cancers in people with type 2 diabetes is elevated by factor six and 4.25 respectively compared to the general population. The epidemiologists also found the risk of cancers of the kidneys, thyroid, esophagus, and nervous system to be more than twice as high.

In addition, the study confirmed an observation suggesting that people with type 2 diabetes have a significantly lower rate of prostate cancer. This was particularly apparent in diabetes patients with a family history of the disease. The more family members are affected by diabetes, the lower is the personal risk. "Right now, we can only speculate about the causes," said Hemminki. "Possibly, a lower level of male sex hormones in diabetics may be among the factors that are responsible for this."

Could it be that rates in study participants with type 2 diabetes appear to be increased just because their tumors happened to be found earlier as a result of hospital routine diagnostics? To rule this out, the researchers separately analyzed how many cancers had occurred in study participants after one and five years respectively following their hospital stays. Although this revealed a slightly lower risk elevation, the trend was the same.

In the industrialized countries, between two and twenty percent of the population get type 2 diabetes. Hence, this metabolic disease ranges among the greatest challenges for the public healthcare system. , which used to be incorrectly called "old age diabetes", is characterized by insulin resistance in tissue. It means that the cells of those affected do not take up glucose from the blood upon receipt of an insulin signal.

Explore further: Liberia's Sirleaf sees signs of Ebola 'stabilisation'

More information: Risk of Cancer Following Hospitalization for Type 2 Diabetes. The Oncologist 2010, DOI:10.1634/theoncologist.2009-0300

add to favorites email to friend print save as pdf

Related Stories

Birth records hold pancreatic cancer clue

Aug 16, 2007

Pregnancies in Jerusalem in the 1960s and 1970s may hold vital clues about how pancreatic cancer and diabetes are linked. According to research published in the online open access journal BMC Medicine, women with a history ...

Recommended for you

Texas orders family of Ebola patient to stay home

1 hour ago

Health officials in Texas ordered four "close family members" of the first man diagnosed with Ebola in the United States to stay home, amid reports authorities are monitoring up to 80 people for signs of the disease.

New low-cost technique to detect rotavirus

2 hours ago

Researchers at the Universidad Politécnica de Madrid (UPM) have found a way to enhance detection capacity of small concentrations of rotavirus. All this thanks to a new way to assess the biosensing response ...

UN launches mission to halt worldwide Ebola spread

3 hours ago

The UN launched a mission on Thursday to prevent the worldwide spread of Ebola as the US hunted for people who came in contact with the first African diagnosed with the deadly virus outside the continent.

User comments : 0