Invasive micropapillary carcinoma of the breast

On the left you see an invasive carcinoma of the breast with micropapillary differentiation and intraductal component in the center at medium power view (10x). This picture was taken from a breast conserving specimen of a 3 cm carcinoma with extensive lymphovascular invasion and lymph node metastasis. The intraductal component and the lymphangic spread are seen on the right.

Micropapillary carcinoma are notorious for extensive lymphovascular spread (Pettinato G et al. Am J Clin Pathol. 121: 857-66, 2004).