Brazilian President Luiz Inácio Lula da Silva on Monday began a preventive radiotherapy treatment following the removal of a cancerous lesion from his scalp, in a medical intervention that places the spotlight on the health of the 80-year-old leader four months before the presidential elections in which he will seek a fourth term. The Sirio-Libanés Hospital, the private center where Lula receives care, confirmed the start of the treatment through a medical bulletin released mid-morning in Brasil