Treatment selection of renal masses is informed largely by size. Furthermore, decisions regarding active surveillance involve closely monitoring growth kinetics. It is, therefore, important to understand the accuracy behind radiographic size as compared with pathologic.A large number of studies indicate computed tomography (CT) imaging overestimates pathologic size, albeit by a small amount. Smaller masses tend to be overestimated, but larger masses underestimated. Clear cell renal cell carcinoma masses are more likely to be overestimated. CT, ultrasound and MRI have similar concordance with pathologic size.The differences between radiographic and pathologic size are small. Findings show good efficacy across CT, MRI and ultrasound. This may reduce reliance on CT imaging alone in the future.

Purpose of reviewTreatment selection of renal masses is informed largely by size. Furthermore, decisions regarding active surveillance involve closely monitoring growth kinetics. It is, therefore, important to understand the accuracy behind radiographic size as compared with pathologic.Recent findingsA large number of studies indicate computed tomography (CT) imaging overestimates pathologic size, albeit by a small amount. Smaller masses tend to be overestimated, but larger masses underestimated. Clear cell renal cell carcinoma masses are more likely to be overestimated. CT, ultrasound and MRI have similar concordance with pathologic size.SummaryThe differences between radiographic and pathologic size are small. Findings show good efficacy across CT, MRI and ultrasound. This may reduce reliance on CT imaging alone in the future.

A study was undertaken to assess a technique of 360° ablation of urethral stricture tissue with a 120 W KTP laser in comparison with the results of visual internal urethrotomy. Ninety-three men with urethral strictures were treated with 120 W KTP laser vaporization using the circumferential technique to eliminate the entire stricture. The strictures were located at the bladder neck in 14 men, the bulbar urethra in 65 patients and the penile urethra in the remaining 14 patients. The follow-up ranged from 6 months to 2 years with an average of 13 months. All patients had flexible urethroscopy 4 weeks after the laser vaporization and then a follow-up examination at 6 months and 1 year. The treatment was considered a success when no further therapy was required. Satisfactory results were established if the patient needed only one post-treatment therapy with dilatation using sounds or a catheter. The treatment was designated a failure when patients needed multiple therapies or another operative procedure. The success rate for strictures at the bladder neck was 92% (13/14 men) with satisfactory in 8% (1/14 man) and there were no failures. At the bulbar urethral stricture site, vaporization was successful in 80% (52/65 men), satisfactory in 9% (6/65 men), and failed in 11% (7/65 men). Penile urethral strictures had success with 71% (10/14 men) and 29% (4/14 men) were considered failures. Ninety-three men with urethral strictures were treated with a 120 W KTP laser. The overall success rate was 81%. With improved technique and the advent of the 180 W KTP laser, further improved results are to be expected. In einer Studie wurde die 360°-Ablation urethraler Strikturen mittels 120 W KTP-Laservaporisation durchgeführt und mit Ergebnissen der visuellen internen Urethrotomie verglichen. 93 männliche Patienten mit urethralen Strikturen (Blasenhals: n = 14; bulbäre Harnröhre: n = 65, penile Harnröhre: n = 14) wurden mittels benannter Methode behandelt. Das Follow-up-Intervall betrug 6 Monate bis 2 Jahre (Mittelwert: 13 Monate). Alle Patienten wurden 4 Wochen, 6 Monate und 1 Jahr nach der Laserbehandlung mittels flexibler Ureteroskopie untersucht. Die Therapie wurde als erfolgreich eingestuft, wenn keine Folgebehandlung erforderlich war und als befriedigend, wenn der Patient einmalig mit Sonden oder einem Katheter dilatiert werden musste. Benötigten die Patienten multiple Nachbehandlungen bzw. war ein erneuter operativer Eingriff notwendig, wurde die Laserbehandlung als gescheitert betrachtet. Die Erfolgsrate bei Strikturen des Blasenhalses lag bei 92% (13/14 Patienten); bei einem Patienten (8%) war die Therapie befriedigend. Strikturen der bulbären Harnröhre wurden in 80% (52/65 Patienten) erfolgreich und in 9% (6/65 Patienten) befriedigend behandelt. Die Therapie versagte in 11% der Fälle (7/65 Patienten). Die penilen Harnröhrenstrikturen wurden in 71% (10/14 Patienten) erfolgreich behandelt. In 29% der Fälle (4/14 Patienten) konnte kein Behandlungserfolg erreicht werden. 93 Patienten wurden mittels 120 W KTP-Laservaporisation behandelt. Insgesamt lag die Erfolgsrate bei 81%. Mit einer verbesserten Technik und den Vorteilen des 180 W KTP-Lasers ist eine weitere Verbesserung der Erfolgsraten zu erwarten.