According to Dr. Olivia Aranha at Saint Francis Medical Center, about 90 percent of breast cancers occur in women with no family history.
However, Dennington wasn't aware of that, therefore, she didn't feel the need to do monthly breast exams.
"I'm embarrassed to say that I didn't check myself, I didn't do my exams," she said.
However, that all changed in 2010 when a routine check up with the gynecologist led to being diagnosed with an aggressive form of stage 1 breast cancer.
When she got the news that her biopsy came back positive, it was a reality she wasn't ready to face or tell her family.
"I think I was numb until I told my husband and that's when, it just breaks your hear to have to say those words and to see the heartbreak on his face and to feel so helpless," Dennington said. "It was very scary."
It was the unknown that frightened her the most.
“You don't even know what that looks like," she said. "I couldn't even imagine did I look different at that moment or what was that going to look like in the future."
That is why she turned to writing.
She began putting her inner most thoughts on paper.
"It was about my fears and just what I was thinking and I felt better," she said.
Soon after, she began putting those same thoughts on a blog for others to see and know what she was going through without having to ask.
"I would put you know about going to the doctor or how I was feeling or what I was thinking as the day was coming up that I was going to lose my hair."
Her posts were eventually published in the book "Me and the Ugly C" after a friend pitched the idea to a publishing company.
Dennington's words shed light on a place she thought she'd never be and offer insight and comfort to other patients.
“When the unknown was the biggest most frightening part of it and I've talked to other people that say the same thing and so for someone who has been diagnosed to be able to read my story, it's not so unknown anymore,” she said.
Dennington believed early detection saved her life.
Dr. Aranha said mammograms save thousands of lives each year, in fact Stage 0 and Stage 1 tumors have a 5-year survival rate of 100 percent.
People interested in reading her book can purchase it at Barnes and Noble or Amazon for just about $10.
Dennington said a portion of the proceeds go to 18 for Life, a local charity based out of Dexter, Mo.
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