As in the controls, cyst cell-EGFR/GalH-testes (Figures 6A, 6A′, 6B) and cyst cell-sSpi/sSpi-testes (Figures 6C, 6C′, 6D) contained a wide area of spermatogonia co-expressing Vasa and Bam (arrows in Figures 6A, 6A′, 6C, 6C′) and contained many narrow fusomes as normally seen in interconnected spermatogonia (Figures 6B, 6D, small arrows). Here, EGFR is linked to cyst.