Lymphadenopathy in children: a concise review.

Lymphadenopathy is commonly found in sick children and the cause of the enlarged nodes is usually evident. However, lymphadenopathy of a prolonged duration or with larger than anticipated nodes often presents a diagnostic dilemma. Knowledge of the normal pattern of lymph node size in children and the mechanisms of lymphadenopathy are prerequisites to approaching the diagnosis. Historical and physical clues help to guide the diagnostic evaluation and may indicate the need for certain laboratory tests, a trial of antibiotics, immediate biopsy, or simply close observation. If a biopsy is performed, comprehensive evaluation of the lymph node is critical to the diagnosis and subsequent treatment. Although most children with peripheral adenopathy have reactive hyperplasia of unknown etiology, it is important to monitor children with persistent lymphadenopathy until a diagnosis is made or the adenopathy resolves.