[Acute obstructive nasal syndrome as expression of infectious mononucleosis. A case report].

The infectious mononucleosis (IM) is a disease which mainly affects people between 15 and 24 years old. We present a case of a men, of 42 years, who has an infectious mononucleosis localized in the nasopharynx area, as its first and unique feature. This patient was admitted at hospital for an urgent treatment. We refer the clinical symptoms, diagnose, main complications and treatment of the condition.