NCIt definition : A general term that refers to a TNM finding of cancer metastases in several regional
lymph nodes. The definition of N2b TNM finding depends on the specific type of cancer
that it refers to; for example, for breast cancer it refers to metastases only in
clinically detected ipsilateral internal mammary nodes and in the absence of clinically
evident level I, II axillary lymph node metastases; for cutaneous melanoma it refers
to macrometastases in 2-3 regional lymph nodes; for colorectal cancer it refers to
metastases in seven or more regional lymph nodes.;
Currated CISMeF NLP mapping