What’s new in the WHO classification of tumors of lung and pleura

The World Health Organization (WHO) tumor classification fascicles (so-called Blue books) are periodically updated in light of significant changes in the understanding of new tumor entities identification, tumor prognosis and innovation of immunohistochemical stains and/or molecular biology of tumors. Information on pathologic and genetic classification and grading of tumors are used worldwide and the WHO Classification of Tumours of the Lung, Pleura, Thymus and Heart was updated in 2015 1. In this monographic issue of Pathologica, expert pathologists of the Pleuro-Pulmonary Pathology Group (GIPP) have selected important topics of pleuro-pulmonary pathologies to review and discuss based on the news contained in the new 2015 Blue book.