The renal resistive index as a predictor of acute hydronephrosis in patients with renal colic.

INTRODUCTION: The objective of this study was to determine whether the renal resistive index (RI) can predict hydronephrosis in patients with renal colic (RC) and whether or not its performance is time-dependent. MATERIALS AND METHODS: The study population was composed of 54 patients admitted for unilateral RC. At the time of the first observation (time point I, tpI), each patient underwent routine examinations, abdominal ultrasonography, and renal color Doppler ultrasound (CDUS) with measurement of the RI. The two imaging studies were repeated 6, 12, 18, 24, 36, and 48 h later (tpII, tpIII, tpIV, tpV, tpVI, tpVII). In addition, each patient underwent non-contrast urinary tract CT 48-60 h after admission. A mean renal RI of >0.70 (mRI+) for the symptomatic kidney was considered indicative of obstruction. Patients were retrospectively divided into two groups: those who developed dilatation (group A) and those who did not (group B). RESULTS: A mRI+ on CDUS predicted the onset of hydronephrosis with 100% sensitivity, 84% specificity, 92.6% accuracy, PPV and NPV of 87.9% and 100%, and diagnostic efficiency of 84%. In group A, mRI+ were always observed before onset of hydronephrosis in a time-dependent manner. In group B, mRI+ were observed occasionally in 4/25 patients (16%) and all were recorded at tpII. In these cases, the RI had returned to normal by tpIII. CONCLUSIONS: In our RC patients, renal RI obtained with CDUS predicted the onset of acute dilatation with higher sensitivity, specificity, accuracy, and diagnostic efficiency than ultrasonography, and it can be used routinely in the emergency department to supplement ultrasound findings.

[Primary echinococcosis of the thyroid gland: apropos of a case]. / L'echinococcosi primitiva della tiroide: a proposito di un caso.

The Authors report a case of primary hydatid cyst of the thyroid. After a review of the literature, they underline the rarity of the case and discuss pathogenesis, clinical and diagnostic related problems. The Authors conclude that, although modern imaging techniques have allowed diagnostic improvements, preoperative diagnosis is still difficult.

The role of ultrasonographic percutaneous cholecystostomy in treatment of acute cholecystitis.

BACKGROUND/AIMS: The Authors propose ultrasonographic percutaneous cholecystostomy in the treatment of acute cholecystitis. MATERIALS AND METHODS: During the period between July 1991-December 1993, 26 patients with acute cholecystitis (18 calculous and 8 acalculous) were observed. The cholecystostomy was performed in principle on patients aged over 70 years and in those with acalculous acute cholecystitis. To rationalize the indication for cholecystostomy in patients aged under 70 years with calculous acute cholecystitis, the Authors elaborated a Risk Score. RESULTS: The cholecystostomy was performed in 23 patients, 15 with calculous and 8 with acalculous acute cholecystitis, and was successful in 22 patients (95.7%). In the group with acalculous acute cholecystitis, the cholecystostomy was the resolutive treatment, while in that with calculous acute cholecystitis was associated, when indicated, to the surgery. CONCLUSIONS: The cholecystostomy interrupted the natural history of the disease and has a low morbidity and mortality. It is an effective and rationale contribution to the treatment of the acute cholecystitis.