How many levels of axillary lymph nodes are there?

There are three levels of axillary lymph nodes (the nodes in the underarm or “axilla” area): Level I is the bottom level, below the lower edge of the pectoralis minor muscle. Level II is lying underneath the pectoralis minor muscle. Level III is above the pectoralis minor muscle.

What is the lymphatic drainage of the axilla?

The axillary lymph nodes, also known commonly as axillary nodes, are a group of lymph nodes in the axilla and receive lymph from vessels that drain the arm, the walls of the thorax, the breast and the upper walls of the abdomen.

What is normal size of axillary lymph nodes?

Axillary lymph nodes, usually up to 1 cm but occasionally 1.5 cm in diameter, can be seen in normal subjects.

Are axillary lymph nodes deep or superficial?

Clinicians divide axillary lymph nodes into three levels. Level II and III lymph nodes are always deep and reported with 38525. Level I nodes may be either deep (reported with 38525) or superficial (38500), depending on the individual patient.

Where are the lymph nodes located outside the axilla?

Infraclavicular (deltopectoral) group: These nodes are not strictly axillary nodes because they are located outside the axilla. They lie in the groove between the deltoid and pectoralis major muscles and receive superficial lymph vessels from the lateral side of the hand, forearm, and arm.

What are the signs and symptoms of axillary lymphadenopathy?

Symptoms of Axillary Lymphadenopathy Axillary lymphadenopathy is characterized by swelling and inflammation of one or several of the 20 to 40 axillary lymph nodes in each armpit. The swelling may be unilateral (involving one armpit) or bilateral (involving both). 2 

When do you need an axillary lymph node dissection?

Breast cancer. About 75% of lymph from the breasts drains into the axillary lymph nodes, making them important in the diagnosis of breast cancer. A doctor will usually refer a patient to a surgeon to have an axillary lymph node dissection to see if the cancer cells have been trapped in the nodes.

Is there risk of damage to axillary lymph nodes?

In the case of comprehensive nodal irradiation, which includes axillary levels I, II, and III, as well as a supraclavicular lymph node field, there is a risk of damage to brachial plexus.