The additional newly identified partner gene, potassium calcium-activated channel subfamily M alpha 1 (KCNMA1), in the conventional TGCT involved exon 9 of CSF1 and intron 5 of KCNMA1. KCNMA1 encodes calcium-activated potassium channels, and gene fusions implicating KCNMA1 have been reported in prostate adenocarcinoma and leukemia [36]. Here, CSF1 is linked to prostate adenocarcinoma.