Erroneous diagnosis of chronic urinary retention in three women with pelvic cysts.

Three cases are presented where pelvic masses were originally misdiagnosed as cases of chronic urinary retention. In all cases the erroneous diagnosis was made at outpatient assessment, where postmicturition ultrasound scan measurement of residual urine volume had been performed. This investigation, while a useful tool, must be viewed in the context of other clinical findings.