NEW : Barbara Bush acknowledged in 1989 she had been diagnosed with Graves ' disease . Bush , 88 , was admitted to the hospital Monday , a hospital spokesman said . ( CNN ) -- ` ` She is in great spirits , '' the spokesman said . The former first lady was treated in 2008 , 2009 and 2010 for various ailments .
NEW : Barbara Bush acknowledged in 1989 she had been diagnosed with Graves ' disease . Bush , 88 , was admitted to the hospital Monday , a hospital spokesman said . ` ` She is in great spirits , '' the spokesman said . The former first lady was treated in 2008 , 2009 and 2010 for various ailments .