[Atypical presentations of internal mammary chain involvement in breast cancer].

Background: Breast cancer is the first cancer in women. Lymphatic involvement in breast cancer is common, especially in our patients because of the frequency of locally advanced forms. This contrast with a weak rate of diagnosed internal mammary chain invasion.

[Internal mammary lymph node invasion in breast cancer: myth or reality?].

The internal mammary nodes are often underestimated as breast cancer lymphatic pathway spread. It is yet the first site of lymphatic invasion in central or internal tumors and the second site in external tumors. The intra-thoracic situation of internal mammary nodes explains partly, the difficulty of its exploration.