This image depicts a close view of a patient’s open mouth highlighting the mouth’s interior, and revealing the hard palatal mucosa, and anterior dorsal surface of the tongue. Both of these intraoral areas had become inflamed due to a mononucleosis infection, caused by the Epstein-Barr virus. Note the maculopapular rash on the hard palate.
“Infectious mononucleosis, also called “mono,” is a contagious disease. Epstein-Barr virus (EBV) is the most common cause of infectious mononucleosis, but other viruses can also cause this disease. It is common among teenagers and young adults, especially college students. At least one out of four teenagers and young adults who get infected with EBV will develop infectious mononucleosis.”
For more on the topic of mononucleosis, see the link below.