NCIt definition : A general term that refers to a TNM finding of cancer metastases usually in a limited
number of regional lymph nodes. The definition of N1b TNM finding depends on the specific
type of cancer that it refers to; for example, for breast cancer it refers to metastases
in internal mammary lymph nodes with micrometastases or macrometastases detected by
sentinel lymph node biopsy but not clinically detected; for cutaneous melanoma it
refers to macrometastasis in one regional lymph node; for colorectal cancer it refers
to metastasis in 2-3 regional lymph nodes.;
Currated CISMeF NLP mapping