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The axillary lymph nodes or armpit lymph nodes are lymph nodes in the human armpit.Between 20 and 49 in number, they drain lymph vessels from the lateral quadrants of the breast, the superficial lymph vessels from thin walls of the chest and the abdomen above the level of the navel, and the vessels from the upper limb.
Axillary lymphadenopathy is distinguished by an increase in volume or changes in the morphology of the axillary lymph nodes. It can be detected through palpation during a physical examination or through changes in imaging tests. On a mammogram (MMG), normal lymph nodes typically appear oval or reniform with a radiolucent center representing ...
Axillary lymph nodes may be normal up to 30 mm if consisting largely of fat. [36] In children, a short axis of 8 mm can be used. [37] However, inguinal lymph nodes of up to 15 mm and cervical lymph nodes of up to 20 mm are generally normal in children up to age 8–12. [38]
An anterior or pectoral group consists of four or five glands along the lower border of the Pectoralis minor, in relation with the lateral thoracic artery.. Their afferents drain the skin and muscles of the anterior and lateral thoracic walls, and the central and lateral parts of the mamma; their efferents pass partly to the central and partly to the subclavicular groups of axillary glands.
The superficial nodes are supplied by lymphatics that are present throughout the arm, but are particularly rich on the palm and flexor aspects of the digits. Superficial lymph nodes of the arm: Supratrochlear nodes: Situated above the medial epicondyle of the humerus , medial to the basilic vein , they drain the C7 and C8 dermatomes .
1 Additional images. 2 References. ... and the axillary glands. (Deltoideopectoral glands labeled at upper left.) ... One or two deltopectoral lymph nodes (or ...
This image shows the surgical procedure of axillary dissection. There are three different levels of axillary lymph nodes. Level I refers to lymph nodes located below the axillary vein or towards the very bottom end of the pectoralis minor muscle. Level II refers to lymph nodes located directly under the pectoralis minor muscle. Level III refers ...
The substance of a lymph node is divided into the outer cortex and the inner medulla. [4] The cortex of a lymph node is the outer portion of the node, underneath the capsule and the subcapsular sinus. [17] It has an outer part and a deeper part known as the paracortex. [17]