If cancer cells from breast cancer enter the lymphatics of the breast where are they likely to lodge and start new growths?

Axillary lymph nodes.

Explanation:

Cancer is defined as the abnormal growth of healthy cells which is usually out of control and leads to the formation of a cell mass called tumour. A cancerous cell can be either malignant or benign.

Malignant cells has the ability to spread from its point of origin to other parts of the body while being so sent spread. When malignant cancerous cells develop in the breast,they usually spread through the lymphatic system and blood stream. The axillary lymph nodes are likely where they will lodge to start new growth since it's the vessel that drains lymph from the breast. I hope this helps thanks!