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Ultrasound
Anatomy
Thorax
Breast
Breast
Nicole S. Winkler, MD
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TERMINOLOGY

  • Definitions

    • Lobe (segment): Drainage territory defined by each major duct
    • Terminal duct: Main duct for segment extending to nipple
      • 2 parts: Extralobular terminal duct (ELTD) and intralobular terminal duct (ILTD)
    • Lobule: Composed of ILTD and complex system of tiny ducts terminating in blind-ending acini (alveoli)
    • Terminal ductal lobular unit (TDLU): Lobule + ELTD
    • Cooper ligaments: Suspensory ligaments extending from anterior mammary fascia into dermis to support breast tissue

LOBE/SEGMENT

  • Composition

    • Clinical Considerations

      DUCTAL SYSTEM

      • Duct Orifices

        • Lactiferous Sinus (Ampullary Segment)

          • Major Ducts

            TERMINAL DUCT LOBULAR UNIT

            • Overview

              • TDLU Proliferation

                • TDLU Regression

                  ZONAL ANATOMY

                  • Premammary Zone

                    • Mammary Zone

                      • Retromammary Zone

                        INNERVATION

                        • Overview

                          • Medial Breast Innervation

                            • Lateral Breast Innervation

                              • Superior Breast Innervation

                                • Nipple-Areolar Complex Innervation

                                  VASCULAR SUPPLY

                                  • Arteries

                                    • Venous Drainage

                                      LYMPHATICS AND LYMPH NODES

                                      • Breast Lymphatic Drainage

                                        • Axillary Lymph Nodes

                                          • Internal Mammary Lymph Nodes

                                            • Intramammary Lymph Nodes

                                              IMAGING ISSUES

                                              • Ultrasound

                                                CLINICAL IMPLICATIONS

                                                • Clinical Importance

                                                  Related Anatomy
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                                                  Related Differential Diagnoses
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                                                  References
                                                  Tables

                                                  Tables

                                                  TERMINOLOGY

                                                  • Definitions

                                                    • Lobe (segment): Drainage territory defined by each major duct
                                                    • Terminal duct: Main duct for segment extending to nipple
                                                      • 2 parts: Extralobular terminal duct (ELTD) and intralobular terminal duct (ILTD)
                                                    • Lobule: Composed of ILTD and complex system of tiny ducts terminating in blind-ending acini (alveoli)
                                                    • Terminal ductal lobular unit (TDLU): Lobule + ELTD
                                                    • Cooper ligaments: Suspensory ligaments extending from anterior mammary fascia into dermis to support breast tissue

                                                  LOBE/SEGMENT

                                                  • Composition

                                                    • Clinical Considerations

                                                      DUCTAL SYSTEM

                                                      • Duct Orifices

                                                        • Lactiferous Sinus (Ampullary Segment)

                                                          • Major Ducts

                                                            TERMINAL DUCT LOBULAR UNIT

                                                            • Overview

                                                              • TDLU Proliferation

                                                                • TDLU Regression

                                                                  ZONAL ANATOMY

                                                                  • Premammary Zone

                                                                    • Mammary Zone

                                                                      • Retromammary Zone

                                                                        INNERVATION

                                                                        • Overview

                                                                          • Medial Breast Innervation

                                                                            • Lateral Breast Innervation

                                                                              • Superior Breast Innervation

                                                                                • Nipple-Areolar Complex Innervation

                                                                                  VASCULAR SUPPLY

                                                                                  • Arteries

                                                                                    • Venous Drainage

                                                                                      LYMPHATICS AND LYMPH NODES

                                                                                      • Breast Lymphatic Drainage

                                                                                        • Axillary Lymph Nodes

                                                                                          • Internal Mammary Lymph Nodes

                                                                                            • Intramammary Lymph Nodes

                                                                                              IMAGING ISSUES

                                                                                              • Ultrasound

                                                                                                CLINICAL IMPLICATIONS

                                                                                                • Clinical Importance