We provided one of the largest gene expression datasets to date of primary SCPC and high-grade adenocarcinoma, albeit in FFPE, including significant proportions of mixed SCPCs (63%), slightly above estimates from the literature (40-50%), and SCPCs with preserved AR signaling (31%), slightly above reported frequencies of AR-positive or PSA-positive SCPC (17-20%) [5, 6]. Here, KLK3 is linked to adenocarcinoma.