Description:Venezuelan President Hugo Chavez arrives in Cuba for surgery on what doctors fear could be pelvic cancer. The charismatic leader was met by in Havana by Cuban leader Raul Castro. Chavez, who had treatment for cancer last year, was scheduled Saturday to undergo a series of tests after doctors found a lesion on his pelvis. The revelation has touched off a wave of speculation about who would replace Chavez if he's unanble to continue as president.(1:11)