Nadine Menendez, wife of New Jersey Sen. Bob Menendez, being treated for breast cancer

Washington — Nadine Menendez, the wife of Sen. Bob Menendez, is being treated for grade 3 breast cancer and will have a mastectomy, her husband disclosed Thursday. 

The New Jersey Democrat revealed his wife's cancer diagnosis in a statement while his trial was underway in federal court in Manhattan. He and his wife are accused of accepting hundreds of thousands of dollars in bribes from three New Jersey businessmen for political favors. 

"We are of course, concerned about the seriousness and advanced stage of the disease," Menendez said in a statement. "She will require follow up surgery and possibly radiation treatment. We hope and pray for the best results."