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.
A blocked lymph node too far under your skin to feel could be the cause of a swollen limb. Diagnosis. Swelling of the lymph nodes in the groin could point to a localized infection in that part of the body, such as an abscess, boil or cut on the skin. An injury, such as a puncture wound, sprain, strain or bone break near the groin, may cause swollen lymph nodes. A sudden inflammation of lymph nodes usually means an injury or infection. A doctor may diagnose a gradual and painless enlargement as a malignancy or tumor. Conditions or diseases that may cause swollen lymph glands include cancer, rheumatoid arthritis, syphilis, coccidioidomycosis and lupus.