Final answer:
Tender, enlarged, and warm cervical lymph nodes in a child are typically indicative of an infection or inflammation close to the site. Infections are more common causes of these symptoms in children than cancerous conditions like lymphoma.
Step-by-step explanation:
When palpating a child's cervical lymph nodes and noting that they are tender, enlarged, and warm, the best explanation is that there is either an infection or inflammation close to the site. Lymph nodes are part of the immune system and can become enlarged and tender when the body is fighting off an infection. Commonly, infections like strep throat or viral illnesses such as infectious mononucleosis can cause these symptoms, and they are more likely than cancer in children. If these symptoms persist or worsen, it is crucial to seek medical attention as it may indicate a more serious condition, such as lymphoma, particularly if infections have been ruled out and symptoms do not improve after appropriate treatment.