Medically reviewed by Marla Anderson, MD Cysts (fluid-filled tissue pockets), infections, and swollen lymph nodes commonly cause armpit lumps. Finding a lump in your armpit can be worrisome, ...

Pain under the left armpit may result from muscle damage or swollen lymph nodes due to an infection. However, it can also indicate a more serious problem, such as cancer or angina. The armpit is a ...

There are around 600 lymph nodes located throughout the body, many of which are clustered in the armpit, groin, and neck. They vary in size from a few millimeters to up to 1.5 centimeters in diameter.

A new bimodal model using CEUS images improves early detection of lymph node metastasis in breast cancer patients.

During your surgery, they may also take out 1 or more lymph nodes from your armpit. We’re experts in diagnosing and treating breast cancer. MSK offers access to the latest research and treatment ...

in which a few lymph nodes in the armpit are removed to check for spreading cancer. Removing lymph nodes can cause lasting pain and arm swelling, so research is underway to determine when it can ...