Abscess: An accumulation of pus that collects in tissues, organs or spaces inside the body.

AIDS: Acronym for Acquired Immune Deficiency Syndrome, which occurs due to a severely weakened immune system, caused by HIV infection.

Cyst: An abnormal membranous sac or cavity in the body, containing fluid.

EBV: Acronym for Epstein-Barr Virus, which is a herpesvirus that causes infectious mononucleosis.

HIV: Acronym for Human Immunodeficiency Virus, which causes AIDS.

HSV: Acronym for Herpes Simplex Virus, which is a virus causing contagious sores, most often around the mouth or on the genitals.

Leukemia: Cancer of the blood cells, commonly called blood cancer.

Lipoma: Harmless growths of fatty tissue.

Lymph Nodes: Small bean-shaped structures of the immune system present throughout the body that traps pathogens and helps fight off infections.

Lymphoma: Cancer of the lymphatic system.

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