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Ovarian Sertoli-Leydig tumour. Light micrograph of a Sertoli-Leydig cell tumour of the human ovary. This is a very rare ovarian tumour that may be benign (non-cancerous) or malignant (cancerous). Sertoli-Leydig cells are normally found in the testicles. They release the male sex hormone testosterone, leading to female patients developing male characteristics such as facial hair and a deep voice. Cells stained with HES. Magnification: x550 when printed at 10cm wide.
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