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Morphometric analysis of symptomatic benign prostatic hyperplasia with and without bladder outlet obstruction
O Ichiyanagi1, I Sasagawa, M Ishigooka
1Department of Urology, Yamagata University School of Medicine, Yamaata-shi, Japan.
Urological Research
|March 25, 2000
Summary
Benign prostatic hyperplasia (BPH) with bladder outlet obstruction (BOO) shows less smooth muscle in adenoma tissue. This reduced smooth muscle may contribute to obstruction in BPH patients.
Area of Science:
- Urology
- Pathology
- Morphometry
Background:
- Benign prostatic hyperplasia (BPH) is a common condition in aging men.
- Bladder outlet obstruction (BOO) is a significant complication of BPH.
- Histological differences in BPH with and without BOO require further investigation.
Purpose of the Study:
- To compare the histological composition of BPH adenoma in patients with and without BOO.
- To identify specific tissue components that may correlate with the presence of BOO.
Main Methods:
- Morphometric analysis was used to quantify tissue components in BPH adenoma samples.
- Samples were obtained from 32 patients with symptomatic BPH undergoing transurethral surgery.
- Patients were divided into two groups: 22 with BOO and 10 without BOO.
Main Results:
- No significant differences were observed in the area density of stromal and glandular components between the obstructed and unobstructed groups.
- Glandular epithelium and lumen areas did not differ between the groups.
- A statistically significant decrease in the area density of smooth muscle was found in the BPH adenoma of the obstructed group compared to the unobstructed group (P < 0.01).
Conclusions:
- A reduced proportion of smooth muscle in BPH adenoma is associated with bladder outlet obstruction.
- Decreased smooth muscle density may be a contributing factor to BOO in patients with BPH.
- These findings highlight the potential role of smooth muscle in the pathophysiology of BPH-related BOO.