A 65-Year-Old Man with Benign Prostatic Hyperplasia Has Moderately Severe

A 65-year-old man with benign prostatic hyperplasia has moderately severe symptoms and is started on finasteride.  After six months of treatment with finasteride, his symptoms improve markedly and his prostate has regressed in size.  Which of the following histological patterns was most likely present at the time of initiation of treatment?

A) Hyperplasia of prostate with predominance of epithelial components
B) Hyperplasia of prostate with predominance of muscular element
C) Hyperplasia of prostate with predominance of collagen
D) Hyperplasia of prostate with predominance of both collagen and smooth muscles

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