“…Teratomas in newborns usually have an extragonadal localisation (sacrococcygeal, nuchal, intracranial, orbital, pharyngeal, retroperitoneal, in the anterior mediastinum and intrapericardial). Intrapericardial teratomas are rare, occurring in 5 to 6 out of 10,000 children, but this could be an underestimation, as many children remain asymptomatic [25] .…”