Book excerpt: A practical guide for the diagnostic surgical pathologist, this new edition of Biopsy Interpretation of the Breast presents the diverse spectrum of pathologic alterations that occur in the breast in a manner analogous to that in which they are encountered in daily practice. Lesions are grouped together according to their histologic patterns rather than by the traditional benign-malignant categorization in order to simulate the way pathologists face these lesions as they examine microscopic slides on a daily basis. The role of adjunctive studies in solving diagnostic problems in breast pathology is emphasized where appropriate. In addition, the clinical significance and impact on patient management of the various diagnoses are discussed and key clinical and management points highlighted.