Diagnosis and Management of Ovarian Cysts

Clinical Characteristics

Most simple cysts in premenopausal women are functional in nature (follicular or corpus luteum cysts) and will resolve spontaneously, as recommended by the American College of Radiology 1, 2, 3
The absence of symptoms strongly suggests a benign functional process rather than complications like torsion or rupture, according to the American College of Radiology 1, 2
Follicular cysts are more common overall in premenopausal women, as stated by the American College of Radiology 1, 2
Corpus luteal cysts often have characteristic sonographic features including spiderweb-appearing or retracting clot with peripheral vascularity, which would be noted on ultrasound if present, as described by the American College of Radiology 1, 2, 3

Transvaginal ultrasound is the essential imaging modality for characterizing adnexal masses in premenopausal women, as recommended by the American College of Radiology 1, 2, 3
Color or power Doppler should be included to assess for internal vascularity and differentiate solid from cystic components, according to the American College of Radiology 1, 2, 3
Simple cysts (unilocular, anechoic, smooth walls, no solid components) have less than 0.4% risk of malignancy in premenopausal women, as reported by the American College of Radiology 2, 3

Approximately 70% of functional cysts will resolve spontaneously within 8-12 weeks, as stated by the American College of Radiology 1, 2, 3

Do not assume all 5-cm masses require immediate surgery—most functional cysts in premenopausal women are benign and resolve spontaneously, as recommended by the American College of Radiology 1, 2, 3
Ensure adequate ultrasound characterization with both grayscale and Doppler evaluation to identify any concerning features (solid components, papillary projections, irregular walls) that would suggest non-functional etiology, according to the American College of Radiology 1, 2, 3
Size alone does not determine malignancy risk—morphologic features on ultrasound are far more important than size in premenopausal women, as stated by the American College of Radiology 1, 2, 3