Swift says it was her mother who wanted to be forthright with her cancer
in an effort to encourage others to get screened.
"She wanted you to know because your parents may be too busy juggling everything they've got going on to go to the doctor, and maybe you reminding them to go get checked for cancer could possibly lead to an early diagnosis and an easier battle," she writes. "Or peace of mind in knowing that they’re healthy and there’s nothing to worry about. She wanted you to know why she may not be at as many shows this tour. She’s got an important battle to fight."