NSE 13A/B Lecture Notes - Lecture 11: Axilla, Lactiferous Duct, Supernumerary Nipple
30 Nov 2017
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Nse 13: week 11 readings- breast and regional lymphatics. Breasts lie anterior to pectoralis major and serratus anterior muscles. In areola are small elevated sebaceous glanffs, called montgomery glands- secrete protective lipid material during lactation. Areola have smooth muscle fibres when stimulated. Pigmentation depends on skin colour and parity. In each lobulea are clusters of alveoli that produce milk. Breast is composed of a) glandular tissue b) fibrous tissue c) adipose tissue. Glandular: 15 to 20 loves radiating from the nipple- composed of lobules. 15-20 lac ducts form collecting duct system that converges at the nipple. More than 75% of lymph drains into the ipsilateral (same side) axillary nodes four groups of axillary nodes are present. High up in the middle of the axilla, over the ribs and serratus anterior muscle. Receive lymph from the other three groups of nodes: pectoral (anterior)- along the lateral edge of the pectoralis major muscle, just inside the anterior axillary folds, subspacular (posterior)
