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  • Title: Genetic origin analysis of hydatidiform mole and non-molar abortion using the polymerase chain reaction method.
    Author: Fujita N, Tamura S, Shimizu N, Nozawa S.
    Journal: Acta Obstet Gynecol Scand; 1994 Oct; 73(9):719-25. PubMed ID: 7976249.
    Abstract:
    OBJECTIVES: The study attempts to determine the genetic origin of hydatidiform mole and non-molar abortion using the polymerase chain reaction (PCR) method, and reevaluates this method as a possible diagnostic tool for hydatidiform mole. MATERIAL AND METHODS: A total of 71 cases which consists of 21 complete hydatidiform moles, three partial hydatidiform moles, and 47 non-molar abortions were investigated. The genetic origin was analyzed by the PCR method applied to the variable number of tandem repeat regions of the Apolipoprotein B gene, the human type-II collagen gene, and the probe YNZ22. Chromosomal analysis was also performed. RESULTS: Genetic origin was determined in 58 out of 71 cases (83.1%). All of the complete hydatidiform moles were androgenic, having only paternal alleles. On the other hand, all the partial hydatidiform moles and non-molar abortions revealed clear biparental contribution. Besides triploid partial hydatidiform moles, one non-molar abortion showed two paternal and one maternal complements. CONCLUSIONS: Our results were compatible with the classical theory of androgenic origin of complete hydatidiform mole; only complete hydatidiform mole is caused by androgenesis. We also found no complete hydatidiform mole of biparental origin. In conclusion, this PCR method brings a new aspect of genetic origin in the diagnosis of trophoblastic disease. It would be interesting to explore how morphologic subgrouping and genetic origin relate to the prognosis of trophoblastic disease.
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