"Blob" and "bagel" signs predict ectopic pregnancy

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  • 2 signs of ectopic pregnancy (blob and bagel) found to have good sensitivity and specificity for diagnosis of ectopic pregnancy.

Why this matters

  • With the use of transvaginal ultrasound (TVS), ectopic pregnancy can be diagnosed earlier and is the gold standard for diagnosis.
  • Language describing ectopic pregnancy and pregnancy of unknown location (PUL) is often confusing and inconsistent.

Key results

  • Probable ectopic pregnancies were described as "blob" (72.5%) or "bagel" (27.5%); these signs had a 95% positive predictive value for ectopic pregnancy.
  • PUL eventually diagnosed as ectopic pregnancy (24 blob and 19 bagel).
  • 51% of all blob diagnoses and 59% of bagel diagnoses had surgery and positive pathology resulting in an 89.9% sensitivity, 99.5% specificity for blob and 83.3% sensitivity, 99.6% specifici...