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Borderline Ovarian Tumor
Synonyms/Description
Tumor of low malignant potential (LMP tumor)
Etiology
Ten to fifteen percent of epithelial ovarian tumors are considered borderline malignancies. They tend to occur in women in their forties and fifties, younger than those with frankly invasive tumors, and they are not thought to be related to hereditary breast/ovarian cancer syndromes. These tumors are stage I at diagnosis in more than 90% of patients, have infrequent recurrence, and an excellent prognosis. The survival rates for stage I and stage III are close to 100% and 80% to 90%, respectively. The survival is good even in patients who have developed peritoneal spread. Just more than half are serous, with the rest being mucinous and occasional mixed intestinal cell or endometrioid types. The mucinous tumors tend to be unilateral and are most often of the intestinal type, with a minority being of the endocervical type. Serous tumors have a higher incidence of bilaterality.
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