A) Image showing localization of hGH-V protein to the syncytiotrophoblast by
immunohistochemistry (brown cytoplasmic staining with nuclear sparing, mAb 6F1) in
term placental tissue, inset shows the negative control (mAb 7E8). B) Image showing
the linear pattern of distribution of hGH-V in a case of partial hydatidiformmole. A similar
pattern of expression was demonstrated in all cases of GTD regardless of detectable or
non-detectable serum hGH-V.