Sertoli–Leydig cell tumor of the ovary are hereditary, referral to a clinical genetics service should be considered. The prognosis is generally good as the tumour tends to grow slowly and usually is benign: 25% are malignant. For malignant tumours with undifferentiated histology, prognosis is poor. See also Androgen-dependent syndromes Leydig cell tumour Sertoli cell tumour References External links Gynaecological cancer Male genital neoplasia Rare cancers Endocrine-related cutaneous conditions