Purpose:The expression of Nitric oxide Synthase (NOS) and aquaporin (AQP) water channels in rat bladder is recently reported. The aim of this study is to evaluate the expression of inducible NOS (iNOS), aquaporin-3 (AQP-3) in cyclophosphamide (CYP) induced rat bladder. Materials and Methods:The 32 Sprague-Dawley rats were divided into cystitis group (n=20) and control group (n=12). In cystitis group, 100mg/kg CYP was injected every second day for 1 week whereas in control group, normal saline was injected. After extracting of the bladder and dividing dome, body and trigone of the bladder, independently H&E staining and immunohistochemical staining for iNOS and AQP-3 were performed. Expressions of iNOS and AQP-3 were analyzed with a confocal laser scanning microscope and an image analyzer. Results: The expression of iNOS significantly increased in the mucosa, submucosa layer of dome in cystitis group (p<0.05). The expression of AQP-3 significantly increased in the mucosa, submucosa, vessel layer of dome in cystitis group (p<0.05). Conclusions: These results suggest that inflammatory change activates NOS and AQP-3 expression in the bladder tissue of rats. These may imply that NOS and AQP-3 have a pathophyiological role in the cyclophophamide induced interstitial cystitis. Further study on the NOS and AQP-3 in bladder is needed for clinical application.

An 82-year-old woman was admitted to our hospital with a palpable mass in her right lower abdomen. The mass was enlarged and tender for the previous 3 months. Abdomen-pelvic computed tomographic scan demonstrated severe right hydroureteronephrosis and about an 8x8x9cm sized huge irregular shaped pelvic mass. Retrograde pyelography showed complete obstruction of the right middle ureter. En bloc resection of the mass and segmental resection of the ureter was performed. Pathologically, it was diagnosed primary leiomyosarcoma of the ureter. At 3 month postoperatively, there has been no recurrence or metastasis.

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The efficacy of finasteride in the treatment of hematuria associated with benign prostatic hyperplasia (BPH) is well known. Recent studies have also shown that finasteride reduce angiogenesis and prostatic bleeding associated with BPH. We evaluated that pretreatment with finasteride could decrease perioperative bleeding associated with transurethral resectrion of prostate (TURP) in this way. Material and methods:A total of 56 patients who underwent TURP due to BPH between January 2004 and August 2006 were evaluated. Of the patients, 30 recieved pretreatment with finasteride 5mg daily (group 1) while 26 did not undergo any pretreatment (control group). In the group 1, 17 had pretreatment period of 3months or more (group 2). In all patients we evaluated the degree of perioperative bleeding, intended as a reduction tendency in hemoglobin (Hb) and hematocrit (Hct) value in the 24 h following TURP. Also, we evaluated the correlation of the preoperative factor and postoperative change of Hb and Hct.Results: Difference of reduction tendency in Hb and Hct between group 1 and control group was not significant (p=0. 86, 0.95, respectively). Difference between group 2 and control was not significant (p=0.56, 0.29, respectively). The change of Hb and Hct correlated with prostate volume, significantly (p=0.006, 0.010). Also, operation time was correlated with the change of Hb and Hct (p=0.006, 0.011).Conclusions: There were no significant difference of the perioperative bleeding according to finasteride medication or medication duration.