Pathologically, CD24 has been described in B-cell neoplasia (Pirucello and Lang, 1990; Raife et al, 1994; Lavabre-Bertrand et al, 1994), renal cell carcinoma (Droz et al, 1990), small cell lung cancer (Jackson et al, 1992), nasopharyngeal carcinoma (Karran et al, 1995), hepatocellular carcinoma (Huang and Hsu, 1995), bladder carcinoma (Gromova et al, 1999), glioma (Senner et al, 1999), breast cancer (Fogel et al, 1999; Liu and Vadgama, 2000) and ovarian cancer (Welsh et al, 2001; Kristiansen et al, 2002). The gene discussed is CD24; the disease is breast cancer.