Castro undergoes radiation treatment in Florida , Miami , for lung cancer . She had surgery last year to remove tumor in lung , biographer says . `` It 's a serious condition , but I 'm not at the side of my grave , '' Juanita Castro Ruz says on her website .
Juanita Castro Ruz undergoes radiation treatment in Miami , Florida , for lung cancer . She had surgery more than a month ago to remove tumor in lung , biographer says . `` It 's a serious condition , but I 'm not at the side of my grave , '' Castro says on her website .