Cistoadenoma mucinoso fronterizo (borderline) del ovario, en una ni？a antes de la menarca

ovarian epithelial tumors (cystoadenomas/cystoadenocar-cinomas) are not as common in girls as the germinal tumors (teratomas). mucinous or serous borderline cystoadenomas (cadb) with a low malignant potencial, represent 20% of epithelial tumors. as an intermediate type of bening-malignant neoplasia, these tumors are usually giant cystic pelvic masses found in young females, but exceedingly rare before menarche. stage 1 (tumor limited to the ovary) is the most frequent stage at diagnosis. bilateral ovarian compromise occurs in 10-15% of patients. open surgery is preferrred to perform a fertility sparing procedure such as oophorectomy, salpingo-oophorectomy or even a tumorectomy in selected cases. the latter requires intraoperative biopsy confrmation of free margins, to prevent recurrence. prolonged follow up is indicated to detect a recurrence or a contralateral tumor development. survival is excellent in most of these patients. we present the case of a premenarchal girl with a huge mucinous cadb.