Clinical use of immunoperoxidase markers in excluding ectopic gestation
Ectopic pregnancy is suspected when a pregnancy test is positive and an Arias-Stella phenomenon with decidua is seen on endometrial curettings in the absence of chorionic villi and trophoblast. We performed immunoperoxidase stains for beta-hCG, hPL, placental alkaline phosphatase, and keratin (AE1/A...
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Published in | Obstetrics and gynecology (New York. 1953) Vol. 78; no. 3 Pt 1; p. 433 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
01.09.1991
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Subjects | |
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Abstract | Ectopic pregnancy is suspected when a pregnancy test is positive and an Arias-Stella phenomenon with decidua is seen on endometrial curettings in the absence of chorionic villi and trophoblast. We performed immunoperoxidase stains for beta-hCG, hPL, placental alkaline phosphatase, and keratin (AE1/AE3) on endometrial curettings of 72 patients with first-trimester bleeding in whom ectopic pregnancy was suspected based on routine hematoxylin and eosin (H&E) stain. Negative immunoperoxidase stains correlated with a retrospective patient chart review identified only ten patients with extrauterine pregnancy, a prevalence of 14%. The sensitivity of hCG, hPL, placental alkaline phosphatase, and keratin markers in detecting trophoblastic cells in the curettings was 42, 48, 24, and 69%, respectively. Each marker had a specificity of 100%. When both keratin and hPL were used, the sensitivity improved to 73%; however, there was no advantage in using three or more markers. We conclude that 73% of patients suspected to have ectopic pregnancy would be spared additional diagnostic techniques when immunoperoxidase markers for keratin and hPL are used on endometrial curettings without trophoblast on routine H&E stain. The procedure requires only 3 hours of laboratory time. |
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AbstractList | Ectopic pregnancy is suspected when a pregnancy test is positive and an Arias-Stella phenomenon with decidua is seen on endometrial curettings in the absence of chorionic villi and trophoblast. We performed immunoperoxidase stains for beta-hCG, hPL, placental alkaline phosphatase, and keratin (AE1/AE3) on endometrial curettings of 72 patients with first-trimester bleeding in whom ectopic pregnancy was suspected based on routine hematoxylin and eosin (H&E) stain. Negative immunoperoxidase stains correlated with a retrospective patient chart review identified only ten patients with extrauterine pregnancy, a prevalence of 14%. The sensitivity of hCG, hPL, placental alkaline phosphatase, and keratin markers in detecting trophoblastic cells in the curettings was 42, 48, 24, and 69%, respectively. Each marker had a specificity of 100%. When both keratin and hPL were used, the sensitivity improved to 73%; however, there was no advantage in using three or more markers. We conclude that 73% of patients suspected to have ectopic pregnancy would be spared additional diagnostic techniques when immunoperoxidase markers for keratin and hPL are used on endometrial curettings without trophoblast on routine H&E stain. The procedure requires only 3 hours of laboratory time. |
Author | Kaspar, H G Dinh, T V To, T |
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SubjectTerms | Decidua - chemistry Dilatation and Curettage Endometrium - chemistry Female Humans Immunoenzyme Techniques Predictive Value of Tests Pregnancy Pregnancy, Ectopic - diagnosis Pregnancy, Ectopic - epidemiology Prevalence Retrospective Studies Sensitivity and Specificity Trophoblasts - chemistry |
Title | Clinical use of immunoperoxidase markers in excluding ectopic gestation |
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