Biopsy Pathology of the Bronchi is intended to provide the practicing pathologist with a convenient source of diagnostic information, combined with pertinent clinical patterns and a background of histogenesis. It is hoped that the book will facilitate the accuracy of diagnosis, minimize pitfalls of interpretation and assist in the rapid evaluation of acute and chronic bronchial lesions, including neoplasms. Biopsy is taken in the widest sense and the book includes discussions on cytology, microbiopsies (fine needle aspiration biopsies, curette samples, and biopsies obtained by microforceps) and macrobiopsies, obtained at the time of surgery. Part I of the book deals with the procurement and preparation of bronchial specimens and includes a chapter on fetal development and structure of the normal adult epithelium. In Part II, the histopathology of numerous bronchial diseases are described in detail. Emphasis is placed on the diagnostic features of human lesions' which are illustrated by numerous high quality light and electron micrographs. Understanding normal bron chial structure, cell kinetics, and modulations of phenotypic expression provide insight into many pathological processes. Therefore, although emphasis is placed on the diagnostic features of human disease, the histopathology of corresponding lesions in experimental animals is dis cussed where this provides information helpful in the interpretation of the human lesions. Elizabeth M. McDowell Baltimore Theodore F. Beals Ann Arbor 1985 viii Acknowledgments We give thanks to friends and colleagues who reviewed one or more chapters for us during the writing of this book.