title: Residual urine in prostatism estimated by ultrasound scanning: a simple rule.
mesh_terms: D006801:Humans; D008297:Male; D011470:Prostatic Hyperplasia / Q000150:complications / Q000175:diagnosis*; D014463:Ultrasonography; D001743:Urinary Bladder / Q000473:pathology*; D014555:Urination Disorders / Q000175:diagnosis* / Q000209:etiology