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 In The Groin Area. Infection is the most common cause for swelling of lymph nodes of the groin. The spread of infection is usually limited by the lymph nodes immediately proximal to the site of infection. However infection can by pass a group of lymph nodes and affect those at a higher level. The various causes of swollen lymph nodes in groin are: Infection in the foot, leg, genitals and the groin area.