| Preface | VII |
| Acknowledgements | VIII |
| Abbreviations used | XIV |
1 | Radiology of Benign Breast Disease | |
1.1 | Overview of Benign Breast Disease | 1 |
1.2 | Mammography | 2 |
1.2.1 | BI-RADS Assessment Categories | 2 |
1.2.1.1 | Assessment is Incomplete | 2 |
1.2.1.2 | Assessment is Complete-Final Categories | 2 |
1.2.2 | Advantages of Category Reporting | 2 |
1.3 | Ultrasonography | 3 |
1.4 | Magnetic Resonance Imaging | 4 |
1.5 | Image-Guided Diagnostic Procedures | 4 |
1.5.1 | Fine Needle Aspiration Cytology | 5 |
1.5.2 | Wide Bore Needle Core Biopsies | 5 |
1.5.3 | Directional Vacuum-Assisted Core Biopsy | 8 |
| References | 8 |
2 | Surgery of Benign Breast Disease | |
2.1 | Why Excise Benign Breast Lesions? | 10 |
2.2 | Probably Benign Lesions Excised to Exclude Malignancy | 11 |
2.2.1 | Atypical Ductal Hyperplasia | 11 |
2.2.2 | Lobular Neoplasia | 11 |
2.2.3 | Radial Scar | 12 |
2.2.4 | Columnar Cell Lesions | 12 |
2.2.5 | Mucocele-like Lesions | 12 |
2.2.6 | Microglandular Adenosis | 12 |
2.2.7 | Papillary Lesions | 12 |
2.2.8 | Fibroadenoma | 14 |
2.3 | Guide-Wire Localisation Excision Biopsy | 14 |
2.4 | Follow-up Versus Excision of Indeterminate Lesions | 14 |
| References | 14 |
3 | Pathology of Benign Breast Disease | |
3.1 | Diagnostic Specimens in Benign Disease | 16 |
3.1.1 | Processing Localisation Excision Biopsies | 16 |
3.1.2 | Ancillary Stains in Benign Breast Disease | 17 |
3.2 | Reporting Fine Needle Aspiration Cytology | 17 |
3.3 | Reporting Needle Core Biopsies | 18 |
3.4 | Pathological and Radiological Correlations | 18 |
| References | 19 |
4 | Fibro-epithelial Lesions | |
4.1 | Fibroadenoma | 21 |
4.1.1 | Mammographic Features of Fibroadenoma | 21 |
4.1.2 | Sonographic Features of Fibroadenoma | 22 |
4.1.3 | Magnetic Resonance Imaging of Fibroadenoma | 22 |
4.1.4 | Is the Fibroadenoma Associated with Risk of Malignancy? | 22 |
4.1.5 | Should a Pathologically Proven Fibroadenoma be Excised? | 23 |
4.2 | Fibroadenomatoid Hyperplasia | 24 |
4.3 | Hamartoma | 28 |
4.3.1 | Mammographic Features of Hamartoma | 28 |
4.3.2 | Sonographic Features of Hamartoma | 30 |
4.3.3 | Histological Features of a Hamartoma | 31 |
| References | 32 |
5 | Infiltrative Pseudo-malignant Lesions | |
5.1 | Radial Scar | 35 |
5.1.1 | Pathogenesis of the Radial Scar | 35 |
5.1.2 | Mammographic Features of the Radial Scar | 36 |
5.1.3 | Sonographic Features of the Radial Scar | 36 |
5.1.4 | Is the Radial Scar a Pre-malignant Lesion? | 36 |
5.2 | Sclerosing Adenosis | 42 |
5.2.1 | Radiological Features of Sclerosing Adenosis | 42 |
5.2.2 | Clinical Significance of Sclerosing Adenosis | 42 |
5.3 | Apocrine Adenosis | 48 |
5.3.1 | Clinical Significance of Apocrine Adenosis | 48 |
5.4 | Microglandular Adenosis | 50 |
5.4.1 | Radiological Features of Microglandular Adenosis | 51 |
5.4.2 | Clinical Significance of Microglandular Adenosis | 51 |
5.4.3 | Pathological Features of Microglandular Adenosis | 51 |
| References | 55 |
6 | Hyperplastic Epithelial Lesions | |
6.1 | Epithelial Hyperplasia of Usual Type | 57 |
6.1.1 | Clinical Significance of Ductal Epithelial Hyperplasia of Usual Type | 57 |
6.1.2 | Molecular Pathology of Epithelial Hyperplasia of Usual Type | 60 |
6.2 | Atypical Ductal Hyperplasia | 61 |
6.2.1 | The Concept of Atypical Epithelial Hyperplasia | 61 |
6.2.2 | Current Pathological Criteria for the Diagnosis of Atypical Ductal Hyperplasia | 61 |
6.2.3 | Mammographic Features of Atypical Ductal Hyperplasia | 61 |
6.2.4 | Clinical Significance of Atypical Ductal Hyperplasia | 63 |
6.2.5 | Management of Patients with Atypical Ductal Hyperplasia | 63 |
6.2.6 | Molecular Pathology of Atypical Ductal Hyperplasia | 64 |
6.3 | Atypical Lobular Hyperplasia | 64 |
6.3.1 | Clinical Significance of Atypical Lobular Hyperplasia | 64 |
6.3.2 | What is the Risk of Bilateral Cancer in Patients with Atypical Lobular Hyperplasia? | 66 |
6.3.3 | Management of Patients with Atypical Lobular Hyperplasia | 66 |
6.3.4 | The Concept of Lobular Neoplasia | 66 |
6.3.5 | Comparison of Atypical Lobular Hyperplasia and Atypical Ductal Hyperplasia | 67 |
6.4 | Intraductal Papillomas | 67 |
6.4.1 | Radiological Features of Intraductal Papillomas | 70 |
6.4.2 | Are Intraductal Papillomas Pre-malignant? | 70 |
6.4.3 | Supportive Evidence for Intraductal Papillomas as Pre-malignant Lesions | 71 |
6.4.4 | What is the Subsequent Risk of Breast Cancer Associated with Intraductal Papillomas? | 72 |
6.5 | Pregnancy-like Change | 76 |
| References | 82 |
7 | Cystic Lesions | |
7.1 | Fibrocystic Change | 85 |
7.1.1 | Possible Aetiological Factors and Pathogenesis of Fibrocystic Change | 85 |
7.1.2 | What is the Stimulus that Evokes the Metaplastic Process? | 87 |
7.1.3 | Mammographic Features of Fibrocystic Change | 87 |
7.1.4 | Sonographic Features of Fibrocystic Change | 88 |
7.1.5 | Pneumocystography | 88 |
7.1.6 | Magnetic Resonance Imaging of Cysts | 88 |
7.1.7 | Management of Cysts | 88 |
7.1.8 | Clinical Significance of Fibrocystic Change | 89 |
7.1.9 | Molecular Pathology of Fibrocystic Change | 92 |
7.2 | Duct Ectasia | 93 |
7.2.1 | Possible Aetiological Factors and Pathogenesis of Duct Ectasia | 93 |
7.2.2 | Mammographic Features of Duct Ectasia | 94 |
7.2.3 | Clinical Significance of Duct Ectasia | 94 |
7.3 | Comparison of Fibrocystic Change and Duct Ectasia | 96 |
| References | 99 |
8 | Mucocele-like Lesions | 101 |
| References | 106 |
9 | Columnar Cell Lesions | |
9.1 | Blunt Duct Adenosis | 107 |
9.2 | Columnar Cell Hyperplasia | 115 |
9.3 | Literature Review | 115 |
9.3.1 | Columnar Metaplasia | 115 |
9.3.2 | Atypical Lobule | 116 |
9.3.3 | Clinging Carcinoma | 116 |
9.3.4 | Hypersecretory Hyperplasia with Atypia | 116 |
9.3.5 | Cancerisation of Small Ectatic Ducts lined by Atypical Cells with Apocrine Snouts | 116 |
9.3.6 | Columnar Alteration with Prominent Snouts and Secretions | 116 |
9.3.7 | Pre-tubular Metaplasia | 117 |
9.3.8 | Atypical Cystic Lobule | 117 |
9.4 | Proposed Nomenclature for Columnar Cell Lesions | 117 |
9.5 | Clinical Significance of Columnar Cell Lesions | 118 |
9.5.1 | Immunocytochemistry Patterns in Columnar Cell Lesions | 118 |
| References | 118 |
10 | Calcification in Benign Lesions | |
10.1 | Overview of Mammographic Calcification | 120 |
10.2 | Assessing Micro-calcification | 121 |
10.3 | The Nature of Breast Calcification | 121 |
10.4 | Vascular Calcification | 124 |
| References | 126 |
11 | Non-epithelial Lesions | |
11.1 | Fat Necrosis | 127 |
11.1.1 | Radiological Features of Fat Necrosis | 127 |
11.1.2 | Pathological Features of Fat Necrosis | 128 |
11.2 | Focal Fibrosis | 132 |
11.3 | Post-surgical Scarring | 134 |
| References | 137 |
12 | Risk Assessment in Benign Breast Disease | |
12.1 | The Concept of Risk Assessment in Benign Disease | 138 |
12.1.1 | Definitions | 138 |
12.1.2 | Relative Risk Versus Absolute Risk | 139 |
12.2 | Radiological Risk Factors | 139 |
12.2.1 | Wolfe's Breast Parenchymal Patterns | 139 |
12.2.2 | Parenchymal Patterns and Risk of Breast Cancer | 140 |
12.2.3 | Effect of Hormone Replacement Therapy on Breast Density | 141 |
12.3 | Pathological Risk Factors | 143 |
| References | 144 |
| Subject Index | 147 |