Beyonce and Solange Knowles got a cancer scare when dad Mathew Knowles was diagnosed with a rare case of male breast cancer. They decided to get tested for the mutated BRCA2 gene, which has been linked to cancer. Here are the results. Both sisters tested negative, highlighting the importance and the need to get scanned for the gene. Neither Beyonce nor Solange Knowles have the mutated BRCA2 gene linked to breast cancer. Beyonce Shocker: Stunning Stage Fail in Poland Leaves Her Stranded! (Watch!) The 38-year-old pop superstar and 33-year-old sister feared they might be at a higher risk of developing