ovarian tumour的用法和样例：
例句
- The diagnosis is made histopathologically, and the differential diagnosis between benign and malignant ovarian tumors cannot be made until operation.
诊断依靠组织病理，良恶性卵巢肿瘤的鉴别诊断只有通过手术才能确定。 - Women who had used estrogens combined with continuous progestins did not appear to have an increased risk of ovarian cancer.
使用雌激素并连续服用孕酮的妇女，发生卵巢肿瘤的危险率并未增加。
