Canine breast cancer may return after 15 years of successful treatment, according to a long-term study of tens of thousands of cases.
The risk of returning breast cancer was highest in patients (40 percent) who had large tumors and cancer spread to lymph nodes, according to researchers published in the current issue of the New England Journal of Medicine journal.
Researchers have followed the history of 63,000 women for twenty years. Each patient suffered the most common form of breast cancer. This type of disease is associated with increased estrogenic hormone production because the hormone has a stimulating effect on the growth and growth of cancer cells.
All patients in the study received treatment that blocked the effect of estrogen and blocked hormone replacement therapy.
Although after five years of treatment, breast cancer has disappeared, after the next 15 years, many patients experienced that the cancer spread throughout their body.
In women who had a lower tumor and cancer did not reach their lymph nodes, there was a 10 percent risk of developing cancer after 15 years.
Hongchao Pan, head of research at the University of Oxford scientist, said that “it is remarkable that breast cancer can remain in sleep for so long and spread over many years. The risk is closely related to the size of the original tumor and that cancer spread to the lymph nodes “.
According to a study by BBC News, cancer therapy should be used for ten years to prevent cancer return.
At the same time, hormone therapy has side effects – climax-related symptoms, osteoporosis, joint pains and wrist-tunnel syndrome – affecting the patient’s quality of life, so many people stop taking the tablets.
It is important for women who are cured of the disease to constantly monitor their condition and if their slightest signs of deterioration are felt, it is imperative to turn to a specialist – the researchers warned.
Source: MTI / Image: haon.hu /