<prompt> Reinke crystalloids can be seen in which of the following sex cord-stromal tumours?Leydig cell tumourGranulosa cell tumourGonadoblastomaThecoma  <response>: Hilus cell tumours pure Leydig cell tumours are rare, unilateral tumors comprised of large lipid-laden Leydig cells with distinct borders and characteristic cytoplasmic structures called Reinke crystalloids. 