A Toronto woman turned her battle with breast cancer into a defiant act of strength by climbing one of the world's most famous mountains to honour her final year of remission.What first began as a minor nipple irritation led to then-29-year-old Tarot Stephens being diagnosed with breast cancer, a disease which she tells blogTO runs in her family. "I came back to Toronto [after living in Los Angeles] and at the biopsy, they discovered that it was grade three invasive ductal carcinoma, which is a very aggressive form of breast cancer," she says. Since the diagnosis, Stephens has endured multiple rounds of chemotherapy, a double mastectomy and reconstruction, and will have to take menopause-inducing medication for at least the next five years.Breast cancer is rarely diagnosed in people under the age of 40, according to Health Canada. Most cases (80 per cent) occur in women over the age of 50, but rates are rising among women in their 30s and even 20s, lik...