Genetics of Hydatidiform Moles
In this presentation, Dr. Pantrangi will discuss the importance of the distinction between hydatidiform moles (a.k.a. molar pregnancy) and nonmolar conceptions, their accurate diagnosis, precise assessment of the risk of persistent gestational trophoblastic disease, including choriocarcinoma associated with different subtypes of hydatidiform moles, and the appropriate guidance of clinical management. Dr. Pantrangi will elaborate on the genetic origins of hydatidiform moles and nonmolar pregnancies and diagnostic techniques. Also, a few cases will be discussed to demonstrate the potential pitfalls encountered with the use of a single technique or solely based on morphology, which can lead to misinterpretation of the results. For instance, donor egg conceptions and lack of clinical history led to the misinterpretation as complete hydatidiform mole (CHM) based on short tandem repeat genotyping data alone. Dr. Pantrangi will illustrate how the integration of ancillary techniques, particularly p57 immunohistochemistry and DNA genotyping, would help in providing refined diagnosis. She will also briefly talk about genomic imprinting role on the malignant potential of hydatidiform moles.
