Juanita Castro currently undergoes radiation treatment in Miami , Florida , for lung cancer . Juanita Castro Ruz , sister of former Cuban leader Fidel Castro and Cuban President Raul Castro , is undergoing radiation treatment in Miami , Florida , for lung cancer , her spokeswoman told CNN . She had surgery more than a month ago to remove tumor in lung , she says . ` ` It 's a serious condition , but I ' m not at the edge of my grave , '' she says on her blog .
Juanita Castro currently undergoes radiation treatment in Miami , Florida , for lung cancer . She had surgery more than a month ago to remove tumor in lung , she says . ` ` It 's a serious condition , but I ' m not at the edge of my grave , '' she says on her blog .