Breast anatomy

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Complete anatomy about breast (unique)

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Breast anatomy

  1. 1. Dr. NipunMBBS, Dhaka
  2. 2. Youngest known survivor of breast cancer
  3. 3. “You are never tooyoung for breast cancer” Diagnosed at age of 2 years Total MastectomyJuvenile SecretoryBreast Carcinoma
  4. 4.  Mammary gland. Present in both sexes. Rudimentary in male. Well developed in female after puberty. Apocrine gland.
  5. 5. - In the superficial fascia of the pectoral region. Vertically: 2nd to 6th ribs. Horizontally: lateral border of sternum to mid- axillary line.• Above: Clavicle• Below: 7th to 8th ribs• Medially: Midline• Posteriorly : to the edge of latissimus dorsi
  6. 6. 2nd rib Pectoralis major Skin6th rib Fat
  7. 7. Deep relations:
  8. 8. Skin: • Nipple • AreolaParenchymaStroma
  9. 9. Skin AreolaNipple Tubercle of Montgomery
  10. 10. Parenchyma: Lobes: Lobules- 15 – 20 in number- Composed of minute glandular Ductulesstructures called lobules- Lobules empty via ductules inlactiferous ducts Lactiferous duct Lactiferous ducts:- Open on to nipple Lactiferous sinus- Contains ampulla near its end(Reservoir of milk or abnormal discharge) Nipple
  11. 11. Stroma:Partly fibrous & partly fatty Ligaments of Cooper:- Anchors the breast with skin- Cancer cells may infiltratethese ligaments, so the breastbecomes fixed & contraction ofthe ligaments can cause retractionor puckering (folding) of the skin.
  12. 12. Non-lactating Lactating
  13. 13. Extremely vascular1. Internal thoracic artery – perforating branches2. Axillary artery – 1. Lateral thoracic artery 2. Superior thoracic artery 3. Acromiothoracic artery3. Posterior intercostal arteries – lateral branchesArteries are distributed in the anterior surface.Posterior surface is relatively avascular.
  14. 14. Axillary arterySuperior thoracic arteryAcromiothoracic arteryLateral thoracic artery Internal thoracic artery Posterior intercostal arteries
  15. 15. o Veins follow the arteries.o First converge around the nipple to form an anastomotic venous circle & then form 02 sets of veins. • Superficial veins: drain into Internal thoracic vein & superficial veins of the lower part of the neck • Deep veins: drain into Internal thoracic , Axillary & Posterior intercostal veins
  16. 16. Axillary vein Anastomotic venous circle Internal thoracic vein
  17. 17. • 4th to 6th intercostal nervesby their Anterior & Lateralcutaneous branches;• Milk secretion by Prolactin,not by nerves
  18. 18. • Axillary (85%) (Sentinel Lymph Node) • Anterior • Central • Apical • Lateral • Posterior • Interpectoral• Internal mammary / Parasternal (10%)• Others (5%) • Supraclavicular • Cephalic / Deltopectoral • Posterior intercostal • Subdiaphragmatic • Subperitoneal
  19. 19. Axillary lymph nodes Apical Central Lateral InterpectoralPosterior Internal mammary lymph Anterior nodes
  20. 20. Devoid of valves. Superficial lymphatics  skin over breast except nipple & areola Deep lymphatics  parenchyma as well as nipple & areola Subareolar plexus Subareolar plexus (of Sappy) of Sappy
  21. 21. 4Mammary ridge
  22. 22. Milk line
  23. 23.  Amastia (Absence of breast) Polymastia (Supernumerary breasts) Athelia (Absence of nipple) Polythelia (Supernumerary nipples) Gynaecomastia (in Klinefelter’s syndrome)
  24. 24. PolytheliaNipple retraction Athelia Polymastia GynaecomastiaAmastia of right breast
  25. 25. PHYSIOLOGY
  26. 26. - Important accessory organ of the female reproductive system.- Provides nutrition to the new born in the form of milk.
  27. 27. Feed Your Faith, Your Fears Will Starve To Death

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