20 



THE UPPER EXTREMITY 



several subordinate groups. Some of the glands have been 

 removed as the dissection proceeded, and others are so small 

 that they may have escaped the attention of the dissector, 

 but if he has followed the directions given above he will 

 have noted at least four groups of glands, (i) A lateral or 

 brachial group consisting of six or more glands, which extend 

 along the axillary vessels. They receive the lymphatics from 



Cephalic vein 

 M. pectoralis major \ 



M. deltoideus Chain of glands related to the axillary vessels 



M. serrntus anterior 



M. pectoralis minor 

 Pectoral glands 



M. latissimus dorsi 



M. pectoralis major 



Lymphatic vessels 

 to sternal glands 



FIG. 9. The Lymph Glands and Vessels of the Axilla and Mamma. 

 (From Poirier and Cuneo modified. ) 



the greater part of the upper extremity, and those at the 

 upper part of the chain also receive lymph from the deep 

 part of the mamma. (2) A pectoral group, or medial group, 

 which lies in the angle between the anterior and medial walls 

 of the axilla. This is subdivisible into two parts : (a) an 

 upper group of two or three small glands which lie beneath 

 the pectoralis major in the region of the second and third 

 intercostal spaces these receive lymph from. the anterior wall 

 of the thorax and from the lateral two-thirds of the mamma ; 

 (b} an inferior group which lies along the posterior border of 



