There is no way to do this from within the formula, but I have a work-around for you.
1. Create a formula that contains all of the text before "Breast" based on your conditions.
2. Create another formula that contains all of the text after "Breast" based on your conditions.
3. Instead of putting the formula directly on the report, put a text box where you want this to appear.
4. Drag your first formula into the text box. Wait until you see a vertical line cursor in the text box before you drop the formula.
5. Type " Breast" in the text box after the formula.
6. Drag the section formula into the text box. Make sure the vertical cursor is at the end of the word "Breast" before you drop it.
7. Highlight just "Breast" and make it italic.
-Dell