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Fertil Steril. 2004 May;81(5):1225-8.

Ectopic pregnancy diagnosis and the pseudo-sac.

Author information

1
Medical Research Council, Biostatistics Unit, Institute of Public Health, University Forvite Site, Cambridge, United Kingdom. aaa42@cam.ac.uk

Abstract

OBJECTIVE:

To evaluate the impact of an ultrasound finding of a pseudo-sac (PS), a uterine sac without a double decidual ring or a yolk sac, on the management of cases with possible ectopic pregnancy.

DESIGN:

A retrospective review of a series of cases.

SETTING:

A general hospital.

PATIENT(S):

Seventy-seven patients who had a diagnostic laparoscopy over a period of 3 years for suspected ectopic pregnancy.

MAIN OUTCOME MEASURE(S):

A logistic regression analysis was conducted to evaluate the effect of the ultrasound finding of a PS on predicting a negative finding at laparoscopy.

RESULT(S):

The report of a PS is significantly associated with a false-positive diagnosis of ectopic pregnancy.

CONCLUSION(S):

A diagnosis of PS should not be interpreted as indicative of an ectopic pregnancy because radiological differentiation between an early intrauterine pregnancy failure and an ectopic pregnancy is not possible.

[Indexed for MEDLINE]

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