FSHR expression in blood vessels associated with strands of invasive breast cancer cells. A) Image of invasive strands of breast cancer cells (asterisk) at low magnification. B) Detail of an invasive strand of cancer cells located at 4 mm outside the tumor border (dashed line in A). Immunohistochemical analysis was performed as described in the legend of Figure 2. Scale bars: 500 μm (A) and 100 μm (B).