A lymph node biopsy is a diagnostic procedure used to examine a lymph node for abnormalities or signs of disease. Lymph nodes, part of the body's immune system, filter lymphatic fluid and help fight infections. When enlarged, firm, or tender nodes are detected during a physical examination or imaging tests, a biopsy may be recommended to determine the cause. The procedure involves the removal of a small sample of tissue from the lymph node for analysis. There are different types of biopsies: a fine-needle aspiration biopsy, where a thin needle is used to withdraw cells, or a core needle biopsy, where a larger needle extracts a tissue sample. In some cases, a surgical excision biopsy, involving the removal of an entire lymph node, might be necessary. Once collected, the tissue sample undergoes laboratory analysis, which may include microscopic examination, molecular tests, or other specialized studies. This analysis helps identify infections, cancers, such as lymphoma or metastatic cancer from other sites, or other abnormalities within the lymph node. Lymph node biopsies are generally safe but may have risks like bleeding, infection, or temporary swelling. Results from the biopsy aid in establishing a precise diagnosis and guide the healthcare provider in determining appropriate treatment plans for the patient's condition.
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