FASLG and carcinoma: FasL, although primarily expressed in cells of lymphoid lineage (Suda et al, 1993) and in immune privileged sites (Bellgrau et al, 1995), has also been shown to be expressed by a number of carcinomas, including colorectal (Shiraki et al, 1997), hepatocellular (Strand et al, 1996) and lung (Niehans et al, 1997).