.. cancers that have struck other Latin American leaders, including Argentine President Cristina Fernandez de Kirchner, afflicted with thyroid cancer, and Brazilian President Dilma Rousseff, struck with lymphoma. After beginning peace talks with the left-wing Revolutionary Armed Forces of Colombia (FARC), Colombia’s conservative president Juan Manuel Santos was diagnosed with prostate cancer.

Venezuela’s acting President Nicolas Maduro charged that Chavez was struck in a «scientific attack» by Venezuela’s «historical enemies»
....
Chavez said the probability of so many Latin American leaders developing cancer at the same time was «difficult to explain».