In this April 2, 2014 file photo, Senate Consumer Protection subcommittee Chair Sen. Claire McCaskill, D-Mo., asks questions during hearings in Washington.
Photo by Pablo Martinez Monsivais/AP

Sen. Claire McCaskill: ‘I have breast cancer’

Missouri Democrat Sen. Claire McCaskill announced on her social media accounts that she has breast cancer on Monday, a disease she says was detected through a routine mammogram.

“I very recently learned that I have breast cancer. It was detected through a regular mammogram,” she wrote on her Tumblr account. “It’s a little scary, but my prognosis is good and I expect a full recovery.”

McCaskill, 62, said that she would spend the next three weeks in St. Louis receiving treatment.

She directed readers to her website for a record on how she would have voted on issues that may come before the Senate during her absence and plans on submitting questions for hearings she may miss. 

This article originally appeared on NBCNews.com.

Claire McCaskill

Sen. Claire McCaskill: 'I have breast cancer'