MSFinals-1702

A 38-year-old woman presents with a gradual masculinisation process, including deepening of her voice, increased body hair, and clitoral enlargement. Ultrasonography shows a tumour in the left ovarian hilus, and her 17-ketosteroid excretion is elevated. The histopathology confirms a diagnosis of hilus cell tumour, with large, lipid-laden tumour cells. Which cells in the male reproductive system are homologous to the affected cells?