Enlarged peripheral lymph nodes (lymphadenopathy or lymphadenomegaly) can occur with lymphoid and plasma cell hyperplasia, inflammation, or lymphoid or metastatic neoplasia. Fine-needle aspiration (FNA) cytology of enlarged lymph nodes is relatively non-invasive and inexpensive, and with experience, often provides an accurate diagnosis. However, in some cases, special stains, biopsy, immunophen...