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.
1 groin lymph node swelling, neck lymph node swelling, underarm lymph node swelling, swollen lymph nodes. 2  Non-Hodgkin's Lymphoma 3  ... painless swollen lymph nodes, groin lymph node swelling, neck lymph node swelling, underarm lymph node swelling. 4  Noonan-like/multiple giant cell lesion syndrome ...