Lancaster Mayor John Howard began chemotherapy treatments for lung cancer Thursday while continuing to battle pneumonia at Carolinas Medical Center in Pineville. “He had his first round of chemo and is tolerating it well,” Karon Howard, the mayor’s wife, said by phone. “He’s doing well with the pneumonia and doing breathing treatments for that.” She said he’s hoarse from those treatments but still talking about City Hall business and fretting about being away from the job.