For Information OnlyBreast
The sentinel lymph node is the first node to receive drainage from a primary tumor. There may be more than 1 sentinel node for some tumors. If a sentinel node contains metastatic tumor, it indicates that other more distant nodes may also contain metastatic disease. If sentinel nodes are negative, other regional nodes are less likely to contain metastasis. Sentinel lymph nodes that have been examined for ITCs are denoted as follows:
pN0(sn)No sentinel lymph node metastasis histologically (ie, none greater than 0.2 mm), no additional examination for isolated tumor cells (ITCs)
pN0(i-)(sn)No sentinel lymph node metastasis histologically (ie, none greater than 0.2 mm), negative morphologic findings for ITCs
pN0(i+)(sn)No sentinel lymph node metastasis histologically, positive morphologic findings for ITCs
pN0(mol-)(sn)No sentinel lymph node metastasis histologically, negative nonmorphologic findings for ITCs
pN0(mol+)(sn)No sentinel lymph node metastasis histologically, positive nonmorphologic findings for ITCs
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