Normal ultrasound values for pole-to-pole kidney length (LPP) are well established for children, but very little is known about normal kidney size and its influencing factors in adults. The objectives of this study were thus to establish normal CT values for kidney dimensions from a group of unselected patients, identify potential influencing factors, and to estimate their significance.

The proximal urethral bulb in men is enlarged, surrounds the bulbous urethra, and extends dorsally towards the perineum. During intercourse engorgement takes place due to increased blood flow through the corpus spongiosum. Antegrade ejaculation is facilitated by contraction of the bulbospongiosus muscles during climax. Micturition during sexual stimulation is functionally inhibited. Supporting the bulb may indirectly facilitate continence in a certain subset of patients with postprostatectomy incontinence. During physical activity with increased abdominal pressure, reflex contraction of the pelvic floor muscles as well as the bulbospongiosus muscles occurs to support sphincter function and limit urinary incontinence. Operations to the prostate may weaken urinary sphincter function. It is hypothesized that the distal urinary sphincter may be supported indirectly by placing a hammock underneath the urethral bulb. During moments of physical stress the “cushion” of blood within the supported corpus spongiosum helps to increase the zone of coaptation within the sphincteric (membranous) urethra. This may lead to urinary continence in patients treated by a transobturator repositioning sling in patients with postprostatectomy incontinence. This paper describes the possible role of the urethral bulb in male urinary continence, including its function after retroluminal sling placement (AdVance, AdVance XP® Male Sling System, Minnetonka, USA).

To summarize the lessons learnt after having performed more than 250 AdVance sling procedures. Postprostatectomy incontinence is a depressing reality that is often underestimated by the prostate surgeon. The practiced gold standard for treating severe stress urinary incontinence has been the artificial urinary sphincter. No such consensus exists for mild to moderate incontinence. This paper is about an incontinence operation with the goal to support postprostatectomy sphincter laxity. The hypothesis of postprostatectomy sphincter laxity is new, as well as restoring continence by proximal relocation of the proximal corpus spongiosum. Abstracts dealing with these issues are summarized. Selected points of technique are highlighted, including modifications that have been made along the way. Lastly the first and last 20 patients treated in this series of 250 patients are compared in terms of operative indication, surgical technique and treatment outcome. Some definitions are added for clarity. It could be demonstrated that the final position of the AdVance sling is retroluminal, i.e. 5-10mm dorsal/behind the lumen of the membranous urethra (=sphincteric urethra). Comparing the first 20 to the last 20, there were no treatment failures in the latter. A two year follow-up showed a continence rate of 65% in the first group, compared to a 85% continence rate in the second group taking into account the short median follow- up of 4.1.months in the latter. Tunneling the sling subcutaneously decreased postoperative loosening significantly. The AdVance sling is a safe method of treating mild to moderate postprostatectomy incontinence, with no erosions in this series of patients. The hypothesis of sphincter laxity seems to play a definitive role in the pathophysiology of male incontinence. Correction of this urethral support descent or "prolapse" seems to be highly effective. Further studies are needed to accurately define the exaxt mechanism of action of the AdVance sling.

Background: A supernumerary kidney (SK) is an additional kidney with its own capsule and blood supply that is not fused with the ipsilateral kidney (IK). Because individual case reports indicate a high morbidity rate, the aim of this retrospective study was a detailed analysis of this rare anatomical variant.Methods: Our systematic imaging-based search for SKs, conducted in the period from 2000 and to 2017, yielded 9 cases in total (5 men, 4 women; mean age: 51.8 ± 22.8 years).Results: The SKs were observed on the right in six and on the left side in three cases. In six subjects (66%) they were located caudal and in three cases (33%) cranial to the ipsilateral kidney. Calculi were found in three (33%) of the renal collecting systems. Five (56%) of the SKs had hydronephrosis grade IV and one SK had recurrent pyelonephritis (11%). Two of the ureters opened into the ipsilateral seminal vesicle (22%). Two (22%) SKs were functional but atrophic. Clinically relevant findings were made in 33% of the IKs: atrophy (n = 2), calculi (n = 1), and reflux with recurrent pyelonephritis (n = 1); another 33% had anatomical anomalies without functional impairment. The correct diagnosis of a SK is possible using CT imaging in all subjects. The prevalence of SK based on CT imaging can be estimated to be 1:26750.Conclusions: CT is the method of choice for visualizing SKs. The correct diagnosis is crucial in preventing dispensable surgical procedures and for providing optimal patient treatment and outcome.