HOXC5 and testicular germ cell tumor: However, only thymoma (THYM, Spearman r = −0.23, p = 0.02, Fig. 7f,) and testicular germ cell tumor (TGCT, Spearman r = −0.32, p < 0.001, Fig. 7i), which originated from telomerase-rich tissues, showed strongest inverse correlation between HOXC5 and hTERT expression.