[Secondary uroliths after surgical correction of urinary bladder extrophy]

The analysis of long-term results of complex surgical correction of urinary bladder extrophy in 83 patients has shown that 21 (25.3%) patients had concrements in the urethra. Multiple bacteriological tests detected urease-producing flora which was managed with specific antibacterial therapy. Two patients were exposed to extracorporeal shock-wave lithotripsy. Low-invasive lithotripsy was low effective and all the patients were operated. Chemical structure of the removed concrements was determined with x-ray difractometry. Recurrent concrements were found in 7 (33.3%) of 21 patients who had not received specific antibacterial therapy. All the stones detected were struvite. Thus, struvite concrements' risk in patients after surgical correction of urinary bladder extrophy can be reduced under the following conditions: suppression of urease-producing flora activity, catheterization regime compliance, systemic sanation of the artificial urinary bladder.