Lymph Nodes
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Lymph node (LN):
Lymphoid tissue that produces lymphocytes and has a capsule; filtering lymph fluid, as afferent lymph vessels enter the node and efferent lymph vessels leave the node
Tonsil (TON):
Lymphoid tissue that produces lymphocytes but lacks a capsule; not filtering lymph fluid, as there are no afferent lymph vessels
Lymph node enlargement (LN/E):
Palpable or visual enlargement of a lymph node
Regional metastasis (MET/R):
Neoplastic spread to regional lymph node(s) confirmed by biopsy
Distant metastasis (MET/D):
Neoplastic spread to distant sites confirmed by biopsy or diagnostic imaging
Lymph node resection (LN/X):
Surgical removal of a lymph node