[Calcified thrombosis of the inferior vena cava in children].

A new case of calcified thrombus in the Inferior Vena Cava is described, and added to the 19 previously reported cases in literature. The etiology of these calcified thrombi is unknown, but a precise diagnostic an therapeutic approach is now well established. On plain X-ray of the abdomen, the right paravertebral bullet-shaped calcification is diagnostic. No further investigations are necessary, except in the neonatal period, when the thrombus is incompletely calcified, suggesting neuroblastoma or adrenal hemorrhage. Definitive diagnosis, in that case, can be made by abdominal ultrasonography. In the current state of our knowledge, the clinical tolerance of this anomaly is excellent. No specific treatment appears to be necessary.