Elston把妊娠滋养细胞疾患分成四种类型,其中之一是滋养细胞假瘤。这一良性又具有侵蚀性的疾病以前曾称为绒毛膜上皮异位症(chceienepitheliosis)、合体细胞瘤、非典型绒毛膜上皮瘤。基于以后病例中有死于转移性疾病者,因此有些作者把此病称之为胎盘部位滋养细胞瘤(PSTT)以强调该疾患是在胎盘着床部位的滋养细胞过度增生。 Elston divided gestational trophoblastic disorders into four types, one of which is trophoblastic pseudotumor. This benign and aggressive disease has previously been referred to as chnephinipitheliosis, somatocytoma, and atypical choriocarcinoma. Based on the subsequent deaths from metastatic disease, some authors have referred to the disease as placental trophoblastic tumor (PSTT) to emphasize that the condition is hyperplastic trophoblast at the placental implantation site.