Occasionally cancers that are more distant may seed these lymph nodes, such as genital cancers or colon cancer. Examples include lung infection, lung cancer, lymphoma in the chest cavity, or breast cancer. These generally suggest cancer or an infection in the region close by. (Lymphomas are cancers that originate in the lymph nodes.) These lymph nodes can also become reactive and enlarge due to trauma or an infection of the arm on the same side.Įnlarged lymph nodes above the collarbone: Enlarged lymph nodes above the collarbone (supraclavicular lymphadenopathy) are always considered abnormal. Many cancers including lymphoma and leukemia can cause enlargement of these lymph nodes. They also play an important role in staging (determining the extent) and predicting the outcome of breast cancer during the removal of the cancer tissue from the breast. They are often checked physically in patients undergoing investigation for breast cancer. The lymph nodes in the underarm (armpit, axilla): The lymph nodes in the underarm are anatomically important in breast cancer.
#Where are the lymph nodes skin#
The most common causes of swollen scalp lymph nodes are skin conditions affecting the scalp, such as dandruff ( seborrheic dermatitis), an abscess, or soft tissue infection. Swollen lymph nodes behind the ear and in the occipital area (base of the skull): Swollen lymph nodes behind the ear or in the base of the skull may correspond to an infection around the scalp or possibly an eye ( conjunctival) infection. Most of the causes of swollen lymph nodes in this area are benign (noncancerous) but sometimes swelling of these lymph nodes may also suggest cancer in the head and neck area. They may represent an infection around that area, such as a tooth infection or abscess, throat infection, viral illness, or upper respiratory infection. Swollen lymph nodes on the side of the neck or under the jaw: Swollen lymph nodes on the side of the neck or under the jaw are the most common.
Rarely, a medication can cause the problem.More serious medical problems such as HIV infection, lymphomas (non-Hodgkin’s lymphoma) or other cancers, or lupus may cause swollen lymph glands. A wide variety of infections are the most common causes of swelling of the lymph nodes, for example, strep throat, ear infections, and mononucleosis.Doctors and other health care professionals check these areas for enlarged or swollen lymph nodes.
The following are common areas where swollen lymph nodes are more prominent and more readily noticeable:
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