Topeka ? A state senator from Johnson County has been diagnosed with breast cancer and is undergoing treatment in Boston.

Barbara Allen, R-Overland Park, disclosed her illness Thursday. She said in a statement that her cancer is in an early stage and is treatable.

“My prognosis is excellent, and I look forward to a full recovery,” he said.

However, Allen missed Senate sessions this week and will be treated at Harvard University’s Cancer Center. She said she will return to her legislative duties soon.

Allen, a 44-year-old attorney, is chairwoman of the Senate Assessment and Taxation Committee. She was elected to the Senate in 2000 and re-elected last year. She also served 12 years in the Kansas House.