Lymphadenopathy is a common symptom in children. Although, the most common causes are infection and autoimmune diseases, most dangerous are malignancies. It can be local or generalized. In local lymphadenopaties infections are prominent causes but in generalized forms systemic diseases should be considered. The rate of malignancy is 1-3 % and lymphomas are most common. Ultrasonography can be helpful with some of the findings to the physician for differential diagnosis and malignancy. If diagnosis could not be confirmed or malignancy is suspected, biopsy is essential
