Divided into the upper and lower lateral and medial quadrants. Has mammary glands which lie in Superficial fascia

Suspensory ligaments attach to the deep superficial fascia

Recieves blood from medial mammary branches of the internal thoracic artery. the lateral mammary branches arise from the lateral thoracic artery

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Modified sweat gland located in the fatty superficial fascia

Axillary tail , a small part of the mammary gland that extends superolaterally

Innervated by the anterior and lateral cutaneous branches of the intercostal nerves

retromammary space, composed of loose aerolar tissue which allows mobility of the breast over the pec major

Lactiferous duct enlarges to form a lactiferous sinus, seperated by the fibrous septa that radiates from the nipple

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Occurs frequently in the upper lateral quadrant

It enlarges attaching to suspensory ligaments, producing shortening of the ligaments, causing a depression or dimpling of the overylying skin

Advanced sign, peau d orange is the edematous swollen obstruction of the subcutaneous lymphatics.

Cancer may attach to and shorten the lactiferous ducts , resulting in a retracted or inverted nipple

Another sign, when the cancer spreads to the retromammary space , so that when the pec major contracts, the breast moves upward

Surgical options include: Masectomy and Radical Masectomy (includes the pec major removal) ouch!

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Central Nodes- lie near the base of the axilla btw the lateral thoracic and subscapular veins; recieves lymph from the lateral, anterior and posterior groups of nodes and drains into the apical nodes, then drains into the subclavian trunks

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