(dailyRx)
Usually a pre-existing condition does not improve chances for survival. For lung cancer and diabetes, that may not be the case.
In a new study, researchers found an interesting link between lung cancer and diabetes. Patients with diabetes and lung cancer had a higher rate of survival than patients with lung cancer but without diabetes.
Researchers from the Norwegian University of Science and Technology and Trondheim University studied 1,677 lung cancer patients and examined the connection between lung cancer and diabetes and its effect on survival.
In the first year, survival rates were 43 percent for diabetic patients with lung cancer and 28 percent for non-diabetic patients with lung cancer; in the second year, 19 percent compared to 11 percent; and in the third year, 3 percent compared to 1 percent.
One possible explanation, but not the only reason, for this increased survival may be due to how diabetes affects cancer traveling through the body. Diabetics have a lower frequency of cancer spreading in the body.
For lung cancer, the main cause of death is not due to malignant tumors in the lung but usually due to metastasis; the lung cancer spreading to other parts of the body. While this may be an advantage, researchers could not really explain the high survival rates for diabetics.
Aside from possible future benefits, this study can help diabetic patients with cancer treatment options. Diabetes is usually considered a pre-existing condition that prevents certain types of cancer treatment.
According to the researchers, just because a patient with lung cancer is diabetic but otherwise healthy, it should not prevent that patient from receiving standard types of cancer therapies.
Researchers did not give a reason for why this may be the case but said the results deserved further examination.
This study will be published in the November edition of Journal of Thoracic Oncology.
The American Cancer Society estimates that each year in the United States, over 220,000 people will be diagnosed with lung cancer, and over 156,000 will die, making it the leading cause of cancer death among both men and women.
There are two main types of lung cancer, non-small cell lung cancer (NSCLC; squamous cell, 25%; adenocarcinoma, 40%; and large cell carcinomas) and small cell lung cancer (SCLC; associated with endocrine cells). There are many other subtypes.