Lamp1-GFP expressing phagosomes of cyst cell provenance were observed to aggregate in the interstitial regions between cyst cells and spermatogonial germ cells prior to LysoTracker staining, and disruption of Lamp1 in cyst cells with RNAi reduced the death of the germline - a necessary qualifier for phagoptotic death. The gene discussed is LAMP1; the disease is cyst.