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Clinical significance of ultrasonography in pediatric mesenteric lymph node enlargement.

??Pediatric mesenteric lymph node enlargement is one of the most common causes of pediatric abdominal pain. The diagnostic criteria for most current report is??the longitudinal diameter > 0.5 cm??vertical and horizontal diameter ratio ??L/T?? more than 2??more than two of lymph nodes changed diffusely and uniformly. Ultrasound can not only diagnose lymph node enlargement timely and accuratly but also evaluate the morphology and blood flow of lymph node??helping us to determine whether there’s a mesenteric lymph node enlargement pathologically and provide the basis for clinical diagnosis and treatment.