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.
Many forms of cancer occurring within the area drained by the groin lymph nodes will lead to swelling (lymphadenopathy). Lymph node swelling usually occurs due to malignant tumors. 1  Leukemia is the cancer of the bodyâs blood forming tissues, including bone marrow and lymphatic system.