The Journal of urology
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The Journal of urology · May 1989
Case ReportsMeconium hydrocele: an unusual etiology of a scrotal mass in the newborn.
The in utero leakage of meconium from the gastrointestinal tract into the peritoneal cavity results in the clinical entity known as meconium peritonitis. A patent processus vaginalis in the male fetus may lead to the migration of meconium into the scrotum, and these infants can present with soft meconium-filled hydroceles at birth. Local tissue reaction during the first several weeks of life results in calcification of these hydroceles into hard tumor-like lesions that may mimic testicular neoplasia. We report an atypical case of meconium hydrocele in a newborn.
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The Journal of urology · Mar 1989
Case ReportsBilateral ureteral stricture from polyarteritis nodosa.
A case of bilateral, asynchronous ureteral stricture from polyarteritis nodosa is described. Two cases of unilateral ureteral stricture from polyarteritis nodosa have been reported previously. Ureteral obstruction not associated with retroperitoneal fibrosis is rare with polyarteritis nodosa.
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The Journal of urology · Aug 1988
Simulation of ventilatory-induced stone movement and its effect on stone fracture during extracorporeal shock wave lithotripsy.
Because ventilation influences renal movement, we investigated the effect of stone motion on the efficiency of extracorporeal shock-wave lithotripsy (ESWL). Comparisons of the rates of fragmentation of an experimental model of renal calculi were made between simulated high-frequency jet ventilation at 100 breaths/min. with four-mm. stone movement as measured from the fluoroscope screen, conventional mechanical ventilation at 10 breaths/min. with 32-mm. stone movement as measured from the fluoroscope screen, and a static control. Fragmentation did not differ significantly between high-frequency jet ventilation and no ventilation (static control), but was significantly greater with high-frequency jet ventilation than with conventional ventilation.
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The Journal of urology · Jul 1988
Comparative StudyDetection and significance of microscopic hematuria in patients with blunt renal trauma.
Detection of hematuria is paramount in establishing injury to the urinary system. In 339 patients with blunt renal trauma in whom radiographic studies defined the severity of injury we compared the degree of microscopic hematuria determined by dipstick and microscopic urinalysis. The overall correlation between the 2 methods was low (Pearson's coefficient 0.41). ⋯ The dipstick method had greater than 97.5 per cent sensitivity and specificity for detection of microscopic hematuria. Only 7 of the 339 patients (less than 2 per cent) had a discharge diagnosis of other than renal contusion: 5 had renal artery thrombosis or avulsion of the renal vessels and 2 had minor cortical lacerations that were managed nonoperatively. Although microscopic hematuria may be quantified more accurately by microscopic analysis, it can be detected reliably with a high degree of sensitivity and specificity by dipstick analysis.