Intramammary lymph nodes: a question seeking for an answer, or an answer seeking for a question? The Breast, October 2012, Vol. 21(5), p.615-620.
Troupis, T., et al.
http://www.thebreastonline.com/article/S0960-9776(12)00118-X/abstract
Intramammary lymph nodes have not received for a long time enough attention from the medical literature and thus many of their characteristics are not sufficiently explored. Their incidence at various studies ranges between 0, 7 and 48%. They may be found in all breast quadrants but usually at the Upper Outer Quadrant (UOQ).