Figure 2: Corpus cavernosum of control and BPH rats treated with dutasteride or finasteride, and stained using Masson's trichrome and captured at ×400. The smooth muscle was reduced in Group C + D (compared to Group C) and in Groups H + D and H + F (compared to Group H). Group H shows more connective tissue (but less sinusoidal space) compared to Group C, and Group H + D has more connective tissue compared to Group H. (a) Control group, composed of Wistar–Kyoto rats (C); (b) control animals receiving dutasteride (C + D); (c) control animals receiving finasteride (C + F); (d) group of BPH models (H); (e) group of BPH models receiving dutasteride (H + D); (f) group of BPH models receiving finasteride (H + F). Scale bars=50 μm. BPH: benign prostatic hyperplasia.