“malignant change”可以造什么句，malignant change造句

Objective:To investigate the relation between the activity of saliva-sucrase and malignant change of oral cavity tumor.

Conclusions Primary ovarian malignant melanoma arising from a mature cystic teratoma with malignant change, was a rare neoplasm.

Objective To investigate the causes of recurrence and malignant change of pleomorphic adenoma (benign mixed tumour) of lacrimal gland.