1 Normal Anatomy and Histology 1

2 Reactive, Inflammatory, and Nonproliferative Lesions 22

3 Intraductal Proliferative Lesions: Usual Ductal Hyperplasia, Atypical Ductal Hyperplasia, and Ductal Carcinoma in Situ 51

4 Columnar Cell Lesions and Flat Epithelial Atypia 96

5 Lobular Carcinoma in Situ and Atypical Lobular Hyperplasia 123

6 Fibroepithelial Lesions 153

7 Adenosis and Sclerosing Lesions 181

8 Papillary Lesions 205

9 Microinvasive Carcinom 236

10 Invasive Breast Cancer 249

11 Spindle Cell Lesions 323

12 Vascular Lesions 344

13 Other Mesenchymal Lesions 361

14 Miscellaneous Rare Lesions 369

15 Nipple Disorders 377

16 Male Breast Lesions 397

17 Breast Lesions in Children and Adolescents 407

18 Axillary Lymph Nodes 416

19 Treatment Effects 435

20 Specimen Processing, Evaluation, and Reporting 448

Index 464