Of the genes linked with breast cancer, BRCA1 and BRCA2 are the most well-understood. When a person is found to have a mutation in one of these genes, there are special recommendations for breast cancer screening, risk-lowering options and care.So, genetic testing for BRCA1/2 mutations can affect a personâs medical care.ost women who get breast cancer do not have an inherited gene mutation. Five to 10 percent of breast cancers in the U.S. are linked to an inherited gene mutation [ 4,35 ]. BRCA1 and BRCA2 (BReast CAncer genes 1 and 2) are the best-known genes linked to breast cancer (learn more).
1 Hilar lymph nodes are found near the lungs (bronchopulmanary). 2  Inguinal lymph nodes are found in groin. 3  Mediastinal lymph nodes are found in the upper body behind the sternum and between the pleural sacs (lung sacs). 4  Mesentery lymph nodes are found in in the lower body (abdomen) below the rib cage.
Mediastinal lymph nodes. The mediastinal lymph nodes comprise a number of lymph node groups, particularly along the trachea, down the esophagus, between the lungs and the diaphragm. Lymphatic dusts are present in the mediastinal lymph nodes where the lymph drainage is drawn off to the left subclavian vein. Lymph nodes of the arm