Complicated EBV infection in a healthy child.

The Epstein-Barr virus (EBV) is highly prevalent throughout the population. Although in most cases, the infection has a good prognosis, it can cause severe complications. We report a case of a healthy child with a primary EBV infection that evolved with two rare complications.

[Sinus Tachycardia in the Adolescent: The Importance of Differential Diagnosis].

Sinus tachycardia is common in pediatric age, and is usually related to benign physiological conditions, such as somatoform disorders. Nevertheless, it can also be a presenting sign of a disease with an ominous prognosis. We present a case of a previously healthy 15-year-old girl, admitted for syncope.