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------------------------------------------------ A 22-year-old lady notices an enlarged lymph node in her neck. The node is in the jugular chain, measures about 1.5 cm, is not tender, and was discovered by the patient yesterday. The rest of the history and physical exam are unremarkable.

A 22 year old lady noticed an enlarged, non-tender lymph node in her neck, which could potentially be due to an infection or other causes, with conditions like lymphoma being less common but possible. Persistent swollen lymph nodes require further medical evaluation.

Explanation:

A 22 year old lady discovered an enlarged lymph node in her neck, which is not uncommon and often indicates immune system activity. Given that the lymph node is not tender and was noticed recently, it could be a reaction to a variety of factors, such as an infection or a response to inflammation somewhere in the body.

Lymph nodes, which are masses of lymphatic tissue, are equipped to filter lymph and store lymphocytes that help fight infections. While swollen lymph nodes can sometimes indicate serious conditions like lymphoma, they are most commonly associated with less severe conditions, such as bacterial or viral infections.

An important consideration with swollen lymph nodes is the duration and accompanying symptoms. If a lymph node does not return to its normal size after a few weeks or if other symptoms develop, further medical evaluation, such as a lymph node biopsy, may be warranted.