Julianne Hough's stomach pains haven't turned out to be no big deal after all: The Dancing With the Stars pro has been diagnosed with endometriosis and has to have her appendix removed, a statement on her Web site says.

"After consulting with her doctor, this was the course of treatment that was recommended,” says a statement on Hough’s web site. She's supposed to discuss the condition on Monday night's show.

"Endometriosis is the development of uterine-lining tissue outside the uterus on the surfaces of organs in the pelvis or abdomen where they are not supposed to grow," the statement explains. "It is a common medical condition found in 5-10% of women of reproductive age around the world."

She was originally take to a hospital after the Oct. 21 show with abdominal pain but had said she was "fine."

[Photo: Getty Images]

Source