Failure to Diagnose Ovarian Torsion: A Case-Screening Guide

Diagnostic error is the largest source of serious malpractice harm, and time-critical surgical emergencies are the cases where a delay maps most directly to a permanent loss. Ovarian torsion is a true gynecologic emergency: a twisted ovary cuts off its own blood supply, and once it becomes necrotic it cannot be saved. The trap that makes this a recurring malpractice scenario is a single, dangerously misunderstood test result — a "normal" Doppler ultrasound that is treated as proof there is no torsion.

Frequency & severity

Ovarian (adnexal) torsion is among the more commonly missed gynecologic emergencies because its presentation overlaps with far more common, benign causes of pelvic pain. The clinical diagnosis alone is unreliable, with reported false-negative rates as high as the majority of cases, and ultrasound accuracy for torsion in published series ranges widely — correct on first imaging in only a fraction of cases. The harm is concrete and permanent: a necrotic ovary must be removed, costing fertility and hormonal function, and in pregnancy a missed torsion endangers the pregnancy. Because the injured patients are typically young women of reproductive age, the damages are severe and the cases settle and try accordingly.

The cannot-miss clinical picture & red flags

The classic presentation is sudden, severe, unilateral lower-abdominal or pelvic pain, often with nausea and vomiting, in a reproductive-age woman. Red flags that should keep torsion high on the differential:

• Acute, severe, often colicky unilateral pelvic pain — classically abrupt in onset, sometimes intermittent as the ovary twists and untwists.
• Nausea and vomiting out of proportion, frequently misattributed to gastroenteritis or a urinary or kidney problem.
• A known ovarian cyst or mass, or an enlarged ovary on imaging — a mass is the leading risk factor and an enlarged ovary on ultrasound is itself a torsion clue.
• Pregnancy or ovulation induction — enlarged ovaries raise torsion risk; pregnancy also lowers diagnostic thresholds.
• Intermittent, recurring episodes of the same pain — a warning of intermittent torsion that should not be dismissed because the patient looks comfortable between episodes.

The single most important pitfall: normal Doppler flow does not rule out torsion. The ovary has a dual blood supply, torsion can be partial or intermittent, and venous obstruction precedes arterial — so arterial flow is frequently still detectable in a torsing ovary. The literature reports torsion missed in a large proportion of cases when clinicians treat preserved Doppler flow as reassuring, and explicitly advises that Doppler should not be used to exclude the diagnosis. Torsion remains a clinical diagnosis; imaging supports it but does not exclude it.

Dominant allegation types

• Discharge on a falsely reassuring Doppler — classic pain, an enlarged ovary or cyst, but the patient sent home because "flow was normal," with no gynecology consult and no surgical exploration.
• Failure to consult gynecology / failure to operate — suspicion was raised but never escalated to the specialist who could take the patient to laparoscopy.
• Anchoring on a benign alternative — the pain charted as a UTI, kidney stone, constipation, ovarian cyst pain, or "menstrual" without ruling out torsion.
• Delay between imaging and surgery — torsion was suspected but the operative window closed during avoidable delays.
• Failure to act on recurrent episodes — intermittent torsion dismissed across multiple visits until the ovary was lost.

What makes a strong vs. weak case

A strong case lines up the elements in the record:

• Breach: a textbook torsion presentation (acute unilateral pain, vomiting, an enlarged ovary or known mass) where the provider relied on normal Doppler to exclude torsion, did not obtain gynecologic consultation, and did not pursue diagnostic laparoscopy despite continuing suspicion.
• Causation: a salvage window in which timely detorsion would more likely than not have preserved the ovary (or, in pregnancy, avoided pregnancy loss).
• Damages: loss of the ovary, impaired fertility or hormonal function, or pregnancy harm.

A weak or defensible case typically involves an atypical, mild, or chronic presentation that was reasonably worked up; an ovary already necrotic at presentation, where even immediate surgery could not have saved it; appropriate ultrasound and timely gynecology involvement that simply did not yield the diagnosis despite reasonable care; or a patient who declined imaging, consult, or admission. Because detorsion can preserve an ovary even after meaningful ischemic time, the duration of the delay and the operative findings (viable vs. frankly necrotic at surgery) are pivotal to whether causation holds.

Contributing factors

The dominant systemic factor is widespread over-reliance on Doppler ultrasound as a rule-out, despite clear guidance that it cannot exclude torsion. Add the overlap of torsion with common benign diagnoses, the relative rarity that keeps it off the default differential, the absence of any single confirmatory test, and the friction of getting a gynecologist to the bedside in a busy ED — and a torsing ovary can sit through hours of avoidable delay while clinicians chase a more common explanation.

The records angle

The chart should answer a short list of questions: how the pain was described (sudden? unilateral? severe?), whether an adnexal mass or enlarged ovary was noted, exactly how the ultrasound and any Doppler findings were interpreted and whether "normal flow" was used to exclude torsion, whether and when gynecology was consulted, and the time from presentation to any operative decision. A clean chronology that maps symptom onset against each decision point exposes the lost surgical window; the EHR audit trail confirms when each entry was made and whether the imaging interpretation was amended after the bad outcome.

The bottom line

The viable missed-torsion case usually rests on one defensible-sounding mistake: treating a "normal" Doppler as proof there was no torsion in a young woman with a classic presentation. If the record shows that reassurance, no gynecology consult, no surgical exploration, and an ovary that timely detorsion more likely than not would have saved, the breach and causation can both be built from the chart and the operative timeline.

General information for attorneys, not legal or medical advice. Standard-of-care, causation, and damages rules vary by jurisdiction — verify every standard, statute, and deadline against current authority in your venue, and rely on a qualified medical expert for the clinical analysis.

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