Introduction Vasa previa is a condition in which the umbilical vessels course through the membranes within the lower uterine segment and traverse over, or near, the endocervical os. These vessels can rupture spontaneously without rupture of the membranes, and result…
Introduction Gestational trophoblastic disease (GTD) is a spectrum of disorders arising from abnormal proliferation of the trophoblastic epithelium of the placenta. There are several histologically distinct types of GTD that range from premalignant, complete, and partial hydatidiform moles (HMs), to…
Introduction Malignant gestational trophoblastic disease (GTD) occurs when there is clinical, radiologic, pathologic, or hormonal evidence of persistent trophoblastic tissue, or abnormal growth of trophoblastic tissue. This is most commonly diagnosed after a molar pregnancy, but it can occur after…
Introduction Chorioangiomas are the most common histologic type of placental tumor. They are usually well circumscribed, vascular, and predominantly hypoechoic, ranging from microscopic to several centimeters in diameter. Disease Prevalence and Epidemiology Chorioangiomas are found in 0.5% to 1% of…