Diagnostic Approach for Suspected Ovarian Cysts

Initial Evaluation

For a female patient with abdominal pain from a suspected ovarian cyst, the American College of Radiology recommends transvaginal and transabdominal ultrasound as the first-line imaging, followed by laboratory tests including serum CA-125, CBC, and pregnancy test 1
A pregnancy test (urine or serum β-hCG) should be performed to rule out pregnancy-related conditions 1
Serum CA-125 should be measured, especially if there are concerning features for malignancy, as recommended by the American Society of Clinical Oncology 2

Pelvic ultrasound (transvaginal and transabdominal) is the most sensitive initial imaging for ovarian pathology and can characterize cyst features (size, septations, solid components) and assess for complications (rupture, hemorrhage, torsion) 1
The ultrasound evaluation should include assessment of the uterus (size, endometrial thickness), ovaries (size, presence of cysts, masses), and cul-de-sac for free fluid 3
Vascular flow using Doppler should be evaluated, particularly if torsion is suspected 1
Specific TVUS findings to look for include wall thickness >5mm, cogwheel sign, incomplete septa, and presence of cul-de-sac fluid 1

CT abdomen and pelvis with IV contrast may be indicated when ultrasound is non-diagnostic, a broader differential diagnosis is being considered, or complications are suspected (rupture, torsion) 1, 4
The O-RADS US Risk Stratification system should be applied to categorize ovarian/adnexal findings, with categories ranging from O-RADS 1 (normal ovaries) to O-RADS 5 (high risk of malignancy) 5
CT imaging should be reserved for cases where ultrasound is non-diagnostic or specific pathology, such as appendicitis, is highly suspected, as recommended by the American Academy of Family Physicians 6
Non-contrast CT "stone protocol" has a sensitivity of 92-99% and specificity of 86-93% for diagnosing urolithiasis 1

Immediate gynecology consultation is recommended, and surgical intervention may be necessary, especially with signs of torsion, cyst rupture with significant bleeding, or large cysts causing significant symptoms 3
Non-pharmacological approaches are recommended as the first line of treatment, and if needed, appropriate analgesics considering pregnancy status, with NSAIDs being an option for non-pregnant patients, as recommended by the American Family Physician 7, 8
Surgical intervention should be considered if calcifications are causing persistent symptoms, there is evidence of erosion into the bladder or urinary tract, or conservative management fails to resolve symptoms 9, 10

A comprehensive laboratory workup should include complete blood count (CBC), comprehensive metabolic panel (CMP), urinalysis, and inflammatory markers, followed by imaging studies to identify the underlying cause, as recommended by the American College of Radiology 4
Additional diagnostic considerations include endometrial biopsy, CA-125, HE4, and Risk of Malignancy Index, and colonoscopy, as recommended by the American College of Radiology 4
MRI pelvis without and with IV contrast is indicated for indeterminate adnexal masses on ultrasound, suspected endometriosis, suspected adenomyosis, pelvic venous disorders, and suspected pelvic floor dysfunction 11, 12
Dynamic pelvic floor MRI or MR defecography is indicated for suspected pelvic organ prolapse, defecatory dysfunction, and recurrent prolapse after surgery 12
MRI with time-resolved postcontrast T1-weighted imaging is recommended for suspected pelvic venous disorders 11
Hematuria in postmenopausal women requires a comprehensive evaluation, with CT urography (CTU) as the recommended imaging modality for evaluating hematuria, regardless of menopausal status, according to the American College of Radiology 9