The illness should be investigated further to determine if it meets the criteria for chronic fatigue syndrome, or CFS. This process includes ruling out other causes of chronic illness or fatigue. [en.wikipedia.org]

In severe cases, steroids such as corticosteroids may be used to control the swelling of the throat and tonsils. Currently, there are no antiviral drugs or vaccines available. [en.wikipedia.org]

The clinical diagnosis of infectious mononucleosis is suggested on the basis of the symptoms of fever, sore throat, swollen lymph glands, and the age of the patient. Usually, laboratory tests are needed for confirmation. [en.wikipedia.org]

Nasopharyngeal cancer Several Non-Hodgkin's lymphomas, including Burkitt's lymphoma and primary cerebral lymphoma Post-transplant lymphoproliferative disorder Smooth muscle tumors[11] Stevens–Johnson syndrome Subepithelial Infiltrates New daily persistent headache [en.wikipedia.org]