The current radiological approach to renal cysts.

Bosniak, Morton A.

doi:10.1148/radiology.158.1.3510019

Cited by 937 publications

(507 citation statements)

References 0 publications

Supporting

Mentioning

454

Contrasting

Unclassified

Order By: Relevance

“…MRI signal characteristics of the mass on T1-and T2-weighted sequences (as compared to renal cortex) were evaluated. All lesions were assigned a Bosniak category [20]. The remainder of the kidneys were evaluated for other focal lesions.…”

Section: Methodsmentioning

confidence: 99%

Mixed epithelial and stromal tumour of the kidney: imaging features

et al. 2010

View full text Add to dashboard Cite

Study Type – Diagnosis (case series) Level of Evidence 4OBJECTIVETo describe the features on ultrasonography (US), computed tomography (CT) and magnetic resonance imaging (MRI) of mixed epithelial and stromal tumours of the kidney.PATIENTS AND METHODSFive women with renal mixed epithelial and stromal tumours (mean age 55.6 years, range 49–59) who had preoperative imaging were retrospectively analysed. Three ultrasonograms, five contrast‐enhanced CT scans, and one contrast‐enhanced MRI examination were available for review. Specific imaging features analysed included lesion size, location, enhancement and cystic composition. The presence of calcification, septation, nodularity and a capsule were also evaluated.RESULTSAll mixed epithelial and stromal tumours appeared as well‐marginated, multi‐septate cystic masses with a nodular component. All lesions were classified as Bosniak category III (three) or IV (two). The presence of calcification (four) or a capsule (three) was variable. Two tumours invaginated into the renal pelvis with no invasion.CONCLUSIONMixed epithelial and stromal tumours of the kidney have a diverse radiographic appearance, indistinguishable from multilocular cystic nephroma and cystic renal cell carcinoma.

show abstract

Section: Methodsmentioning

confidence: 99%

Mixed epithelial and stromal tumour of the kidney: imaging features

et al. 2010

View full text Add to dashboard Cite

show abstract

“…9 A retroperitoneal approach was used for cyst decortication in all. In cases with peripelvic and parenchymal cysts, cystoscopy was performed immediately before laparoscopy with the placement of a ureteral catheter in the renal pelvis.…”

Section: Methodsmentioning

confidence: 99%

Retroperitoneal laparoscopic decortication of simple renal cysts using the bipolar PlasmaKinetic scissors

et al. 2006

View full text Add to dashboard Cite

Objectives: To analyse the efficacy, safety and feasibility of retroperitoneal laparoscopic decortication of simple renal cysts using bipolar PlasmaKinetic scissors. Methods: Records of 19 patients who underwent laparoscopic decortication of simple renal cysts, performed with bipolar PlasmaKinetic scissors without additional fulguration of the base or the margin of resection, were retrospectively reviewed. Longterm symptomatic and radiological outcomes were assessed. Results: One single cyst was treated in fourteen (73.7%) cases, two cysts in three (15.8%) cases, three cysts in one (5.2%) case and multiple cysts in one case with autosomal dominant polycystic kidney disease. They were peripherally located in thirteen, peripelvic in three, and parenchymal in two cases. An average of 3.1 trochars were used for each procedure. The mean operating time was 82.5 ± 16.7 min (range, 50-135). Neither open conversion nor blood transfusion was necessary. A total of six minor complications were encountered. Mean hospital stay 2.3 ± 0.9 days (range, 1-4). After a mean follow up of 14.3 ± 5.9 months (range, 3-24), symptomatic success was achieved in 89.5%, and radiological success was accomplished in 88.2%. An asymptomatic cyst recurrence was observed in one (5.9%) case, and one (5.9%) case with residual pain had new cyst formation at another site of the kidney. Conclusions: Retroperitoneal laparoscopic cyst decortication using bipolar PlasmaKinetic scissors is a feasible and efficient method, eliminating further fulguration of the base and the margins of the cysts. Operating times are shorter than previously published series and highly satisfactory long-term success rates are achieved.

show abstract

“…Alongside the cyst's diameter, wall thickness, presence of septa and contrast enhancing components, the measurement of the mean CT attenuation value (in Hounsfield Units, HU) of the cysts' content on unenhanced CT images as well as the assessment of its attenuation pattern after the administration of intravenous contrast media are supporting the radiologists to classify cystic renal lesions [2]. Cysts surrounded by thin, smooth walls and mean CT attenuation values between 0 -20 HU are considered simple benign cysts if they do not enhance after the application of contrast agents [2][3][4]. These cysts are classified category I by Bosniak [1].…”

Section: Introductionmentioning

confidence: 99%

Dual-energy CT with tin filter technology for the discrimination of renal lesion proxies containing blood, protein, and contrast-agent. An experimental phantom study

et al. 2010

View full text Add to dashboard Cite

PURPOSE: To differentiate proxy renal cystic lesions containing protein, blood, iodine contrast or saline solutions using dual-energy CT (DECT) equipped with a new tin filter technology (TFT). MATERIALS AND METHODS: 70 proxies (saline, protein, blood and contrast agent) were placed in unenhanced and contrast-enhanced kidney phantoms. DECT was performed at 80/140 kV with and without tin filtering. Two readers measured the CT attenuation values in all proxies twice. An 80/140 kV ratio was calculated. RESULTS: All intra-and interobserver agreements were excellent (r = 0.93-0.97; p < 0.001). All CT attenuation values were significantly higher in the enhanced than in the unenhanced setting (p < 0.05; average increase, 12.5 +/-3.6HU), while the ratios remained similar (each, p > 0.05). The CT attenuation of protein, blood and contrast agent solution differed significantly with tin filtering (p < 0.01-0.05). Significant differences were found between the ratios of protein and blood compared to contrast medium solution (each, p < 0.05) and between the ratios of protein and blood in both phantoms with tin filtering (each, p < 0.05). CONCLUSION: DECT allows discrimination between a proxy renal lesion containing contrast agent and lesions containing protein and blood through their different attenuation at 80 kV and 140 kV. Further discrimination between protein and blood containing proxies is possible when using a tin filter.Dual-Energy CT with tin filter technology for the discrimination of renal lesion proxies containing blood, protein, and contrast-agent. An experimental phantom study 1 Abstract Purpose: To differentiate proxy renal cystic lesions containing protein, blood, iodine contrast or saline solutions using dual-energy CT (DECT) equipped with a new tin filter technology (TFT). Materials and Methods:70 proxies (saline, protein, blood and contrast agent) were placed in unenhanced and contrast-enhanced kidney phantoms. DECT was performed at 80/140kV with and without tin filtering. Two readers measured the CT attenuation values in all proxies twice. An 80/140kV ratio was calculated.Results: All intra-and interobserver agreements were excellent (r=0.93-0.97; p<0.001). All CT attenuation values were significantly higher in the enhanced than in the unenhanced setting (p<0.05; average increase, 12.5±3.6HU), while the ratios remained similar (each, p>0.05). The CT attenuation of protein, blood and contrast agent solution differed significantly with tin filtering (p<0.01-0.05). Significant differences were found between the ratios of protein and blood compared to contrast medium solution (each, p<0.05) and between the ratios of protein and blood in both phantoms with tin filtering (each, p<0.05). Conclusion:DECT allows discrimination between a proxy renal lesion containing contrast agent and lesions containing protein and blood through their different attenuation at 80kV and 140kV. Further discrimination between protein and blood containing proxies is possible when using a tin filter.

show abstract

The current radiological approach to renal cysts.

Cited by 937 publications

References 0 publications

Mixed epithelial and stromal tumour of the kidney: imaging features

Mixed epithelial and stromal tumour of the kidney: imaging features

Retroperitoneal laparoscopic decortication of simple renal cysts using the bipolar PlasmaKinetic scissors

Dual-energy CT with tin filter technology for the discrimination of renal lesion proxies containing blood, protein, and contrast-agent. An experimental phantom study

Contact Info

Product

Resources

About