Abstract
Pathology and Pathophysiology of BPH and Relevant Incidental Findings in TUR-P Abstract: Benign prostatic hyperplasia (BPH) is defined as nodular prostate enlargement due to cellular proliferation of prostate glands and stroma. Beside adenocarcinoma, BPH is one of the most common diseases in the prostate. Transurethral resection of the prostate (TURP) is surgical treatment of choice for BPH. Resected tissue fragments are examined in the pathology and belong to the most commonly submitted urologic specimens. Up to date, pathophysiology of BPH is not yet completely understood. Different hormones such as androgens, dihydrotestosterone, estrogens as well as growth factors, inflammation, and environmental influences are important in the process. The diagnosis of BPH is usually straightforward. In this context, it is important to mention incidental findings, which may come along as "bad surprises" while examining TURP tissue fragments. Prostatic intraepithelial neoplasia (PIN) or incidental acinar adenocarcinoma of the prostate as well as the potential preneoplastic atypical adenomatoid hyperplasia (AAH) represent a few examples. According to literature, the histologic examination of TURP tissue reveals a high-grade PIN in up to 5%. Incidental adenocarcinoma is encountered in 5-13%. These frequencies justify a relatively laborious examination of the entire or majority resected TURP tissue.
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