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Details Title: Placental pathology Description: 5.1.07 Total Flash Cards: 14 Created: 05/01/2007 16:46:10	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term what is placenta previa? Definition placenta implants very low in the uterus, covering the internal os. The cervial dialation (at the time of labor) will cause severe bleeding and fetal/maternal death Term decidua? Definition endomentrium modified by progesterone (and able to be shed) and separates the placenta from the myometrium Term placenta accreta Definition endometrium is defective, (like at the site of a previous C-section)--placenta grows into muscle. Term ascending infection Definition most common route. results in amniotic fluid infection and cause chorioamnionitis as an inflammatory response. frequent cause of premature oset of labor. caused by bacteria and less commonly candida Term hematogenous Definition rare, results in villitis. caused by viruses, toxoplasmosis, symphylis, Term placental abruptio Definition rupture of retroplacental (decidual) blood vessel. related to materal hypertensino, may cause large retroperitoneal hemorrhage with spearation of placenta from blood supply and fetal death Term narrowing or thrombosis of retroplacental (decidual) blood vessels Definition causes ischemia and placental infarts. numberous placental infarts will comprimise the delivery of O2 and nutrients to the fetus, resulting in either fetal growth restriction or fetal death Term MZ Definition division of 1 fertilized ovum, and either monochrorionic or dichorionic Term DZ Definition fertilization of 2 ova, and dichorionic Term multiple preg complications Definition Preterm labor Malformations Twin-twin transfusion Term hydatidiform mole Definition Trophoblastic proliferation; Cystic swelling of chorionic villi; May precede choriocarcinoma Term parial mole Definition vv Term why do moles happen? Definition paternal DNA is more heavily methylated which is linked to abnormally prominent development of extraembryonal tissues (such as trophoblasts) Term what are the gross findings of moles? Definition graple-like swollen villi covered with proliferating trophoblast. and HCG levels are abnormally evelvated