- June 30, 2011: Chavez appears on television in Cuba to confirm he had a cancerous tumor removed. He later says the tumor extracted was the size of a baseball.

- July 4, 2011: Returns to Venezuela, but later travels to Cuba periodically for chemotherapy and medical tests.

- Sept. 23, 2011: Says he completed chemotherapy and calls the treatment successful. Says subsequently that tests show no reappearance of cancerous cells.

- Feb. 21, 2012: Says his doctors found a new lesion in the same place where the tumor was previously removed, and announces plans to return to Cuba for surgery.

- Feb. 26, 2012: Undergoes operation that removes the tumor from the same location in his pelvic region. Says later that follow-up tests showed the tumor was "recurrence of the initially diagnosed cancer."

- March 24, 2012: Travels to Cuba to begin first round of radiation therapy.

- April 14, 2012: Travels to Cuba for second round of radiation treatment.

- April 26, 2012: Returns to Venezuela following cancer treatment in Cuba, saying his latest round of therapy was successful.

- July 9, 2012: Says at a news conference that tests showed he is "totally free" of cancer.

- Oct. 7, 2012: Wins another six-year term, beating challenger Henrique Capriles by an 11-point margin.

- Nov. 27, 2012: Announces plans to travel to Cuba for more medical treatment. He says doctors have recommended he "begin special treatment consisting of various sessions of hyperbaric oxygenation."