The diagnosis of lung cancer and benign pulmonary put forward images that in our opinion best represent tumors can be challenging. This diagnosis can be facil- the tumor entities. In some instances, we have recruited itated by the study of images that allow recognition of the collaboration and materials from other workers in the patterns of disease, both at the clinical and pathologic ?eld. levels. Conceptually de?ned, atlases are specialized books The atlas is organized into 11 parts containing 41 that rely heavily upon images to illustrate any subject mat- chapters, closely following the 2004 Classi?cation of ter. Fitting with such a concept, this atlas was developed Lung Tumors by the World Health Organization (WHO). to ?ll a void in the approach to diagnosis. In contrast to Accordingly, the chapters represent a wide range of n- previous conventional atlases, this atlas is unique in that plastic lung entities. It begins with tumors of children images from four major disciplines (endoscopy, radiology, followed by sections on benign epithelial tumors, salivary histopathology, and cytopathology) involved in the study gland tumors, mesenchymal neoplasms, lymphoprol- and diagnosis of lung tumors are brought together in a erative disorders, cardcinoid tumors, and a section of single volume. miscellaneous tumors.