Clinical use of immunoperoxidase markers in excluding ectopic gestation.

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.

journal_name

Obstet Gynecol

authors

Kaspar HG,To T,Dinh TV

subject

Has Abstract

pub_date

1991-09-01 00:00:00

pages

433-7

issue

3 Pt 1

eissn

0029-7844

issn

1873-233X

journal_volume

78

pub_type

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