Doctor José Ignacio Martín Valadés, new Head of Digestive Tumour Section in MD Anderson Cancer Center Madrid Published on 02/03/2020 With more than ten years' experience in treating patients with digestive tumours in the Fundación Jiménez Díaz, Dr José Ignacio Martín Valadés joins the MD Anderson Cancer Center Madrid as the new head of the Digestive Tumours Section in the Medical Oncology Service.