Fatima-Ezzahrae Badi1,2, Paolo Simoni3. 1. Radiology department of Queen Fabiola Children's University Hospital, Brussels, Belgium. badi.fatima.ezzahrae@gmail.com. 2. Faculty of Medicine and pharmacy of Hassan II University, Casablanca, Morocco. badi.fatima.ezzahrae@gmail.com. 3. Radiology department of Queen Fabiola Children's University Hospital, Brussels, Belgium.