Breast Flashcards
Breast is
A modified non capsulated sweat gland
Location of the breast
between 2nd -6th rib
Lies On the superficial fascia
It is separated from the deep fascia by the retromammary space.
Three muscles that are connected to the breast are_____
Pectoralis major(2/3)
Seratus anterior
External oblique
Nipple(Apex) of the breast is ____
The rounded protruding part of the breast which contains the various excretory ducts(pores).
It is located at the level of the 4th Intercoastal space.
It doesn’t contain any fat( adipose tissue).
Base of the breast___
Lies on the muscles
Areolar of the breast ___
Dark portion around the nipple
It doesn’t contain fat.
Number of lobes in the breast
15-20
The lobes are separated by the____
Ligaments of cooper
Number of lobules
20-40 each containing about 15-20 lactiferous ducts.
Lactiferous sinus
A enlarged portion of the lactiferous duct just before the nipple. It is a reservoir of milk
Arterial vasculature of the breast
Internal Thoracic artery( mammary and perforating branch)
Lateral Thoracic artery
Intercoastal artery( perforating branches)
Circular plexus is located at ____
Base of the nipple
Lymphatic drainage of the breast
Central and lateral drainage — pectoral group(75%)
Upper drainage —– apical group
Medial group— parasternal group and the anastomosis of the right and the left breast
Inferoposterior—- lymph node of the linea alba and the rectus sheath
Divisions of the Axillary lymph node
Pectoral group( on the pectoralis minor)
Brachial groups
Central group
Apical group
Sub scapularis group
Ductal carcinoma is
Carcinoma of the ducts
Lobular carcinoma is ____
Carcinoma of the lobes
Invasion of the ligaments of cooper by the carcinoma leads to ___
Peau de orange
Sub clavian trunk In the right side drains into the
Sub clavian vein
Left sub clavian trunk drains into
Thoracic duct
Lymphatic drainage is divided into
- Sub areolar lymphatic plexus( below the areolar)
- Deep lymphatic plexus ( on the deep fascia)
Plexus radiate in
Many directions
All lymph nodes drain into the ____
Apical group and then to the sub clavian trunk
Tail of the breast
Extends into the axilla
Mammary ridge extends from the
Axilla to the groin