“…Immunodiffusion studies have also demonstrated that it is present in homogenates of tumours, especially those of connective tissue origin, and in over 17 different fetal adult fibroblast cell lines. [2][3][4] With the fluorescent antibody technique Kalashnikov and his colleagues3 have shown it can be localised within placenta, umbilical cord, fetal tissues (including skin, bone, and kidney) and in the stroma surrounding some epithelial tumours. In our study, using an indirect immunoperoxidase technique, we have examined formalin-fixed paraffin embedded human fetal and adult tissues for the presence and distribution of EPA, including benign and malignant tumours.…”