Figure 2: HE staining of penis. The corpora cavernosa structure of TGF-β1 group was looser and more disordered; the normal structure of tunica albuginea between left and right corpora cavernosa was also destroyed. Additionally, the numbers of fibroblasts and collagen fibers in the penis were greater in the TGF-β1 group. (a) Image from a rabbit in the TGF-β1 group. (b) Image from a rabbit in the control group. (c) Image image from a rabbit in the TGF-β1 group. (d) Image from a rabbit in the control group. Square: tunica albuginea; triangle: corpora cavernosa; arrow: fibroblasts; circle: collagen fibers. Images were obtained from rabbits euthanized at 20 days after TGF-β1 injection. TGF-β1: transforming growth factor β1; HE: hematoxylin and eosin.