Radiation therapy uses high-energy radiation to shrink tumors and kill cancer cells (1). X-rays, gamma rays, and charged particles are types of radiation used for cancer treatment.
1 Lymph nodes of the armpit and neck may also be involved. 2  Viral infections such as infectious mononucleosis may affect the whole body and cause generalized lymph node swelling in various parts of the body, such as neck, armpit or groin.
Causes of Swollen Lymph Nodes. 1  An infection on the Pinna of the ear due to ear piercing can be a cause of swollen lymph node in front of the ear. 2  Sometimes, the salivary glands present in front of the ear get swollen.3  This happens when the duct or the tube that carries the saliva from the glands get blocked.auses of Swollen Lymph Nodes. 1  An infection on the Pinna of the ear due to ear piercing can be a cause of swollen lymph node in front of the ear. 2  Sometimes, the salivary glands present in front of the ear get swollen.