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Figure 1. A 31-year-old woman who had had amenorrhea for 53 days was found to have a left tubal pregnancy. Ultrasonography (Panel A) demonstrated a gestational sac (GS) containing an embryo (E) and a yolk sac (YS). A cross section of the fallopian tube (Panel B; hematoxylin and eosin, x9.1) reveals a chorionic cavity (CC) containing the yolk sac. The area outlined in Panel B is shown magnified in Panel C (hematoxylin and eosin, x280), revealing the wall of the yolk sac and placenta (P) with an intervillous space (IS). The inset (hematoxylin and eosin, x1500) . . . [Full Text of this Article] |