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TUNEL staining of testicular tissue (×200). (a) Sham group: only a few TUNEL-positive cells were observed. (b) Torsion group and (c) torsion/detorsion (T/D) group: TUNEL-positive cells were mainly observed in germ cells of testis. (d), (e), and (f): T/D + LXA4 subgroup 1–3, respectively. Apoptotic cells were rarely observed in the seminiferous epithelium.
