Falsely Elevated Postvoid Residual Urine Volume in Uterine Myoma

Precise measurement of postvoid residual (PVR) urine volume is a key factor in assessing patients with voiding dysfunction, including those with lower urinary tract problems. The safe and noninvasive ultrasound bladder scan is the preferred mode to measure PVR volume. However, this procedure has a false-positive rate up to 9%, in the presence of ovarian cysts, renal cysts, ascites, or uterine myoma with cystic degeneration. Until now, cystic lesions are known to cause false positivity in ultrasound bladder scanner. However, we encountered falsely-elevated PVR in two cases of non-cystic uterine myomas. We present these cases with detailed radiologic images and volume measurement data.

The influence of post-void residual volume on prostate specific antigen in patients with benign prostatic hyperplasia / 中国医师进修杂志

Objective To study the influence of post-void residual volume on prostate specific antigen (PSA) in patients with benign prostatic hyperplasia (BPH).Methods One hundred and sixty BPH patients who diagnosed by postoperative pathologic manifestations were selected.The patients were divided into 4 groups according to post-void residual volume with 40 cases each:non post-void residual volume (post-void residual volume ＜ 60 ml) group,less post-void residual volume (60 ml≤post-void residual volume ＜ 120 ml) group,middle post-void residual volume (120 ml ≤post-void residual volume ＜ 180 ml) group,mass post-void residual volume (post-void residual volume ≥180 ml) group.The serum PSA levels of 4 groups were observed.Results The PSA level in mass post-void residual volume group [(8.52 ± 6.72) iμ g/L] was significantly higher than that in non post-void residual volume group [(5.26 ± 4.16) μ g/L] and less post-void residual volume group [(5.93 ± 5.20) μ g/L],there were statistical differences (P ＜ 0.05),there was no statistical difference between non post-void residual volume group and less post-void residual volume group (P ＞ 0.05).Conclusions The serum PSA level in BPH patients with non post-void residual volume has no change,while the serum PSA level in BPH patients with mass post-void residual volume is significantly elevated.