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Medical Definition of Sertoli-leydig cell tumour
1. An ovarian tumour usually of low-grade malignancy occurring most frequently in the third and fourth decades, with 75% seen in women under 40. It is rare, representing less than .02% of ovarian cancers. The tumour typically produces androgens with virilization being noted in 70-85% of the patients. (holland et al., cancer medicine, 3d ed, p1684) (12 Dec 1998)