Abstract
Purpose Given a 10% malignancy rate in pediatric ovarian masses, what preoperative factors are helpful in distinguishing those at higher risk to risk stratify accordingly? Methods After institutional review board approval (IRB#022008-095), a 15½-year retrospective review of operative ovarian cases was performed. Results A total of 424 patients were identified, with a mean age 12.5 years (range, 1 day to 19 years), without an age disparity between benign (12.54 years, 89%) and malignant (11.8 years, 11%) cases. The 1- to 8-year age group had the highest percentage of malignancies (22%; odds ratio [OR], 3.02; 95% confidence interval [CI], 1.33-6.86). A chief complaint of mass or precocious puberty versus one of pain had an OR for malignancy of 4.84 and 5.67, respectively (95% CI, 2.48-9.45 and 1.60-20.30). Imaging of benign neoplasms had a mean size of 8 cm (range, 0.9-36 cm) compared with malignancies at 17.3 cm (6.2-50 cm, P < .001). An ovarian mass size of 8 cm or longer on preoperative imaging had an OR of 19.0 for malignancy (95% CI, 4.42-81.69). Ultrasound or computed tomographic findings of a solid mass, although infrequent, were most commonly associated with malignancy (33%-60%), compared with reads of heterogeneous (15%-21%) or cystic (4%-5%) lesions. The malignancies (n = 46) included germ cell (50%, n = 23), stromal (28%, n = 13), epithelial (17%, n = 8), and other (4%, n = 2). Tumor markers obtained in 71% of malignancies were elevated in only 54%, whereas 6.5% of those sent in benign cases were similarly elevated. Elevated beta-human chorionic gonadotropin ( β-HCG), alpha fetoprotein (αFP), and cancer antigen 125 (CA-125) were significantly associated with malignancy ( P < .02) and an elevated carcinoembryonic antigen (CEA) was not ( P = .1880). Conclusion This reported series of pediatric ovarian masses demonstrates that preoperative indicators that best predict an ovarian malignancy are a complaint of a mass or precocious puberty, a mass exceeding 8 cm or a mass with solid imaging characteristics. Those patients aged 1 to 8 years have the greatest incidence of malignancy. Tumor markers, positive or negative, were not conclusive in all cases but useful for postoperative surveillance.
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