ALBANY - Food TV star Sandra Lee, who is Gov. Andrew M. Cuomo's longtime girlfriend, remained hospitalized Wednesday for a fluid buildup that is apparently related to her recent breast cancer surgery, according to a source with knowledge of the situation.

Cuomo left Billy Joel's concert Tuesday night at the Nassau Coliseum after 9 p.m. as Lee, 49, was rushed to the hospital, the source said.

She is expected to remain in the hospital for monitoring of her condition for several days.

An update on Lee's condition is expected soon.

Lee underwent a double mastectomy on May 19 after she was diagnosed with the early stages of breast cancer.