[Value of ultrasound of lymph nodes in children and adolescents in the family doctor's office and in pediatric practice - own investigations].

Sonography is a very useful imaging tool, commonly used in clinical practice in the evaluation of lymph nodes. It is widely available, safe and patient-friendly imaging technique. This article describes the common sonographic features of lymph nodes in children. Gray scale, colour and power Doppler sonographic features of normal and abnormal lymph nodes are described. It also presents new ultrasound imaging techniques such as elastography and contrast-enhanced ultrasonography of lymph nodes.