RESUMO

La mononucleosis infecciosa es una enfermedad infectocontagiosa causada por el virus de Epstein-Barr, que afecta principalmente a personas jóvenes, se caracteriza por presencia de fiebre, faringitis y linfadenopatía, generalmente autolimitada, de 1-2 semanas de evolución. Se presenta el caso de un paciente masculino de 22 años con historia de 1 mes de evolución de fiebre y cefalea al que posteriormente se añade odinofagia, adenopatía cervical posterior y exantema generalizado. En analítica laboratorial se constata leucocitosis con neutrofilia. Entre sus estudios complementarios retorna IgM para virus de Epstein-Barr positivo.

Infectious mononucleosis is an infectious disease caused by the Epstein-Barr virus, which mainly affects young people. It is characterized by the presence of fever, pharyngitis and lymphadenopathy, generally self-limited, lasting 1-2 weeks. The case of a 22-year-old male patient with a 1-month history of fever and headache is presented to which odynophagia, posterior cervical lymphadenopathy, and generalized rash are later added. Laboratory analysis revealed leukocytosis with neutrophilia. Among his complementary studies, IgM for Epstein-Barr virus was positive.