The thymus role has been unclear until the second half of 1900. Nowadays its function is much clearer, and the increase of the thymus pathology is a challenging problem that can be better faced. The most important thymus diseases often require a multidisciplinary approach, and involve several specialists, from the clinical immunologist to the neurologist and the radiologist, from the surgeon to the anaesthesist and the oncologist. The volume deals with the whole range of this gland pathology and describes the most recent surgical and non surgical techniques. Written by international experts, it will be very useful for all those involved in the treatment of these diseases.