“…Ultrasound alone cannot define a clear clinical condition, can be very useful to demonstrate some specific disease-related imagings, like the characteristic "donut sign", as reported in this clinical case description [Fig.3]. CT scan can confirm this specific sign [9], showing with greater accuracy the site of intussusception, whether small bowel, cecum or colon. Intravenous contrast injection can improve the diagnosis of lymphadenopathy close to intussusception, differentiating inflammatory from metastatic nodes.…”