(WZZM) - The number of advanced breast cancer cases is going up and while researchers say the numbers are small, it's still a significant problem.

Researchers are seeing the hike in women between the ages of 25 and 39.Since the 1970's, the number of women in that age group with advanced breast cancer went up two percent.

It's concerning because young women's tumors can be more aggressive than those in older women.

Researchers say the trend shows no signs of decreasing.

Younger women are less likely to have insurance or get regular screenings.

Researchers say it's important for women to know their risk factors and to pay close attention to their family health history.

"The pre-disposition to cancer can be passed down from one generation to the next and those families can be identified because they do develop earlier breast cancers that can be more aggressive," said Dr. Holly Pederson with the Cleveland Clinic.

The lowest five year breast cancer survival rates are among women between 20 and 34 years old.

Early detection saves lives.Regular screenings and self breast exams are important. To learn more about breast cancer, click here.