TY - JOUR
T1 - Placental pathology suggesting that preeclampsia is more than one disease
AU - Nelson, David B.
AU - Ziadie, Mandolin S.
AU - McIntire, Donald D.
AU - Rogers, Beverly B.
AU - Leveno, Kenneth J.
PY - 2014/1
Y1 - 2014/1
N2 - Objective Our purpose was to evaluate the placental pathology in women with preeclampsia occurring at varying gestational ages. Study Design This was a secondary analysis of a prospective observational study of placentas from prespecified complicated pregnancies routinely submitted for standardized examination. For this study, a database of placental diagnoses from liveborn singleton gestations without major malformations was linked to a computerized obstetric database. The rates of standardized placental findings including vascular (atherosis, infarction) and nonvascular (hyperplasia) changes were evaluated according to gestational age at diagnosis of preeclampsia. Results Between Jan. 1, 2001, and Sept. 30, 2007, a total of 7122 women with pregnancies complicated by preeclampsia were delivered at our hospital. Of these, 1210 (17%) had placental examinations. Within this cohort, 209, 355, and 646 women were diagnosed with preeclampsia at gestations of 240/67 to 33 6/7, 340/7 to 366/7, and 370/7 weeks or longer, respectively. Placental findings revealed hypoplasia was significantly associated with preeclampsia early in the third trimester, and histological evidence of placental vascular lesions was significantly increased at gestations of 240/67 to 336/7 weeks (53%) compared with 34% and 26% at 340/7 to 366/7 and 37 weeks or longer, respectively (P <.001). Conclusion The placentas of women with preeclampsia onset before 34 weeks' gestation were significantly different from those with preeclampsia at term. The former group demonstrated placental findings predominantly consistent with insufficiency because of vascular abnormalities. Such differing placental findings support the hypothesis that preeclampsia is a different disease, depending on the gestational age at diagnosis.
AB - Objective Our purpose was to evaluate the placental pathology in women with preeclampsia occurring at varying gestational ages. Study Design This was a secondary analysis of a prospective observational study of placentas from prespecified complicated pregnancies routinely submitted for standardized examination. For this study, a database of placental diagnoses from liveborn singleton gestations without major malformations was linked to a computerized obstetric database. The rates of standardized placental findings including vascular (atherosis, infarction) and nonvascular (hyperplasia) changes were evaluated according to gestational age at diagnosis of preeclampsia. Results Between Jan. 1, 2001, and Sept. 30, 2007, a total of 7122 women with pregnancies complicated by preeclampsia were delivered at our hospital. Of these, 1210 (17%) had placental examinations. Within this cohort, 209, 355, and 646 women were diagnosed with preeclampsia at gestations of 240/67 to 33 6/7, 340/7 to 366/7, and 370/7 weeks or longer, respectively. Placental findings revealed hypoplasia was significantly associated with preeclampsia early in the third trimester, and histological evidence of placental vascular lesions was significantly increased at gestations of 240/67 to 336/7 weeks (53%) compared with 34% and 26% at 340/7 to 366/7 and 37 weeks or longer, respectively (P <.001). Conclusion The placentas of women with preeclampsia onset before 34 weeks' gestation were significantly different from those with preeclampsia at term. The former group demonstrated placental findings predominantly consistent with insufficiency because of vascular abnormalities. Such differing placental findings support the hypothesis that preeclampsia is a different disease, depending on the gestational age at diagnosis.
KW - placental pathology
KW - preeclampsia
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U2 - 10.1016/j.ajog.2013.09.010
DO - 10.1016/j.ajog.2013.09.010
M3 - Article
C2 - 24036400
AN - SCOPUS:84890846774
SN - 0002-9378
VL - 210
SP - 66.e1-66.e7
JO - American journal of obstetrics and gynecology
JF - American journal of obstetrics and gynecology
IS - 1
ER -