Washington (SmartAboutHealth) - A new study from the Archives of Internal Medicine has found that some cancer may not need invasive treatment and may instead disappear on it sown.

The new study was led by Per-Henrik Zahl of the Norwegian Institute of Public Health and aimed to see if screening programs helped cancer patients.

The study compared two groups with the first being made up of 120,000 women between the ages of 50 and 64.

These women all went through three rounds of mammograms from 1996 to 2001.

They were compared to a group of women in the same age in 1992 who did not go through the mammogram program.

They found that in the group that had the screenings, invasive breast cancer was 22% higher.

They also found though that there were many cases where the cancer would disappear on its own.

Researchers concluded that too many screenings may lead to invasive and unnecessary treatments for cancer.

They stated that a significant number of cases had the cancer going into regression on its own.