“…Several tumor cells also express endoglin, including pre-B cell and monocytic leukemia (Quackenbush and Letarte, 1985;Haruta and Seon, 1986;Lastres et al, 1992;Zhang et al, 1996), choriocarcinoma (Letamendia et al, 1998a), ovarian carcinoma (Jindal et al, 1995), melanoma (Altomonte et al, 1996), prostate cancer (Liu et al, 2002) and basal and squamous cell carcinomas (Quintanilla et al, 2003). The presence of endoglin in both cells and vasculature of tumors has stimulated studies on the role of endoglin in cancer Takahashi et al, 2001;Duff et al, 2003). In this respect, recent reports suggest that elevated plasma levels of endoglin in patients with colorectal cancer or breast carcinoma correlate with poor prognosis Duff et al, 2003).…”