[Do the nephrolithometry scoring systems predict the success of percutaneous nephrolithotomy. Comparison of 4 scores: The Guy's stone score, STONE Score, CROES nomogram and S-ReSC score]. / Les scores radiologiques peuvent-t-ils prédire le succès de la NLPC ? Étude comparative du Guy's stone score, du STONE score, du CROES nomogram, et du S-ReSc score.

INTRODUCTION: The aim of the study is to investigate the factors predictive of surgical outcomes of PCNL and to compare the predictability and accuracy of the Guy's stone score, STONE nephrolithometry, CROES nomogram and S-ReSC score. PATIENTS AND METHODS: We reviewed retrospectively the surgical outcomes recorded consecutively and imaging data of preoperative computed tomography scans of patients who underwent PCNL from 2013 to 2016. Patients with asymptomatic residual fragments<4mm were considered stone-free. Preoperative abdominopelvic computerized tomography images of the patients were reviewed and scored according The Guy's stone score, STONE nephrolithometry, CROES nomogram, S-ReSC score by one urologist. RESULTS: A total of 157 PCNLs were reviewed. The overall stone-free rate was 59% (92/157) with a complication rate of 22% (35/157). Stone Burden<542mm3 is significantly associated with stone-free rate (SFR) (P=0.001). On univariate analysis, all the scoring systems were identified as significant factors in terms of SFR. The Guy's Stone Score, the CROES score and the S-ReSC score were associated with complications (P<0.02). The multivariate logistic regression analysis showed that the CROES score was identified as a significant factor in terms of SFR and complications (P<0.01). The area under the receiver operating characteristic (ROC) curves for stone burden, the Guy's, STONE score, CROES core and S-ReSC scores showed good results (0.737/0.674/0.762/0.746/0.710) respectively. CONCLUSION: Although the four scoring systems were significantly associated with SFR, the STONE score was a significant predictive factor for SFR and complications after PCNL. LEVEL OF EVIDENCE: 3.

[Case report : Emphysematous cystitis]. / Le cas clinique du mois : La cystite emphysémateuse.

The emphysematous cystitis is a rare condition characterized by the presence of air in the wall and/or the bladder lumen. The clinical expression of this cystitis is variable. Some patients complain of abdominal pain or urinary symptoms. Other may present only pneumaturia or be totally asymptomatic. This condition is considered as potentially severe since it can lead to an emphysematous pyelonephritis with septicemia and septic shock. Peritonitis may also occur in case of necrosis and perforation of the bladder wall. However, this negative development can be avoided by a diagnosis and an early treatment, and the emphysematous cystitis become therefore of good prognosis. We are here stating the case of a patient with an emphysematous cystitis with symptoms of pneumaturia and lower urinary tract symptoms.

La cystite emphysémateuse est une affection rare caractérisée par la présence d'air dans la paroi et/ou la lumière vésicale. L'expression clinique de cette cystite est variable. Le plus souvent, elle se manifeste par des douleurs abdominales ou des plaintes urinaires, mais les patients peuvent également présenter une pneumaturie ou être symptomatiques. Cette affection est considérée comme potentiellement sévère puisqu'elle peut évoluer vers une pyélonéphrite emphysémateuse avec septicémie et choc septique ou vers une péritonite en cas de nécrose et perforation de la paroi vésicale. Cependant, cette évolution défavorable peut être évitée par un diagnostic et un traitement précoces et la cystite emphysémateuse est, en réalité, de bon pronostic. Nous rapportons ici le cas d'un patient qui a présenté une cystite emphysémateuse s'étant manifestée par une pneumaturie et des mictalgies.