Yes. In addition to being delicious, mushrooms may have some anti-cancer properties.
There are some edible fungi such as flat mushrooms, reishi (which is often included in edible fungi in studies), etc. that may have some anti-breast cancer effects.
Some mushrooms contain a substance called methyl camptothecin triterpene A (MAA) that inhibits stem cell-like cells in breast cancer and contains polysaccharide components that induce apoptosis in breast cancer cells and have anti-proliferative activity. In addition, mushrooms are tasty and non-irritating, and breast cancer patients with chemotherapy or loss of appetite can eat more of them as appropriate.