February 12, 2019, MedPage Today 

Nonsuspicious adnexal masses had a low risk of malignancy, and many of the lesions resolved spontaneously, according to a large prospective study of conservative management. During a median follow-up of 27 months, fewer than 1 percent of 1,919 patients had an invasive malignancy or borderline tumor at surgery. Torsion and cyst rupture also occurred in fewer than 1 percent of cases. 

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