Salvage Urethroplasty With a Modified Tubularized Distal Penile/Preputial Skin Flap for Bulbar Urethral Necrosis After Failed Anastomotic Urethroplasty in Circumcised Patients: A Retrospective Multicenter Study

When a severe pelvic fracture tears through the delicate plumbing of the male urinary system, the damage can be catastrophic. The urethra, the tube that carries urine from the bladder out of the body, often suffers a complete break or a crushing injury that leaves a gap where tissue should be. Surgeons have long known how to repair these injuries by pulling the healthy ends of the tube together and stitching them, a procedure that works well for many. However, in some complex cases, the blood supply to the middle section of the urethra is so badly damaged that the tissue itself dies and disappears, leaving a void rather than just a scar. This condition, known as bulbar urethral necrosis, presents a unique and difficult challenge: there is no healthy tube left to reconnect, so surgeons must build a new one from scratch using skin from elsewhere on the body.

For decades, the standard solution for rebuilding this missing section has relied on having a foreskin available to harvest. In men who have not been circumcised, surgeons can use the inner lining of the foreskin to fashion a new tube, a method that is generally successful because the tissue is naturally mobile and well-supplied with blood. But this leaves a significant gap in medical care for the many men who have been circumcised. If a circumcised man suffers this specific type of tissue death, the usual source of skin is gone, and surgeons have historically struggled to find a reliable way to reconstruct the missing segment without resorting to more invasive options, such as using tissue from the mouth or even the intestine.

A team of surgeons from Algeria, Saudi Arabia, and Egypt recently tackled this problem by adapting an existing technique for a different group of patients. They focused on circumcised men who, despite the removal of the foreskin, still retained a small amount of loose, healthy skin near the tip of the penis. The researchers asked whether this leftover skin could be mobilized and reshaped to replace the dead section of the urethra. Their study, which reviewed the cases of over one hundred men treated between 2015 and 2024, suggests that this modified approach is a viable and effective option for carefully selected patients.

The core of the new technique involves a clever manipulation of the remaining skin. Instead of trying to stretch a single strip of skin, the surgeons harvested a circular band of skin from the distal part of the penis, just behind the head. They then cut this band in half, creating two separate flaps that remained attached to their own blood supply. Think of it like taking a ring of fabric, cutting it open to make two C-shaped pieces, and then using those two pieces to line a new tube. These two flaps were then tunneled under the scrotum and brought down to the perineum, the area between the scrotum and the anus, where the damaged urethra was located. Once in position, the flaps were sewn together to form a new tube, which was then connected to the healthy upper and lower ends of the urethra.

The results of this approach were encouraging. Out of the 113 men who underwent this specific reconstruction, the majority saw successful outcomes. At three months after surgery, more than 80 percent of the patients had a fully open urethra that allowed for normal urine flow without the need for further procedures. Two years later, among those who were followed up, the success rate remained high at 80 percent. This means that for most of these men, the new tube stayed open and functional, allowing them to urinate without obstruction. The surgeons noted that the procedure was particularly effective when the missing segment of the urethra was not excessively long, and they found that the blood supply to the new tube remained robust, preventing the tissue from dying again.

The study also shed light on the broader context of recovery for these patients. Many of the men in the group had suffered severe pelvic fractures and had already undergone failed attempts at repair, leaving them with significant physical and emotional burdens. The researchers observed that while the surgery successfully restored urinary function, it did not necessarily reverse the erectile dysfunction that often accompanies such severe trauma. Most patients continued to experience difficulties with erections, a condition the authors attribute to the original injury to the nerves and blood vessels in the pelvis rather than the new surgery itself. This distinction is important, as it clarifies that the new technique solves the plumbing problem but cannot fix the underlying nerve damage caused by the initial accident.

Complications did occur, as they do with any major surgery, but they were generally manageable. A small number of patients developed infections or minor leaks, and a few experienced temporary numbness in the head of the penis, though this sensation largely returned over time. The researchers were careful to note that their findings apply specifically to circumcised men who had enough leftover skin to work with. For men who had been circumcised with no remaining skin, or for those with very long gaps in the urethra, this technique would not be suitable. The study does not claim that this method is superior to all other options, but rather that it fills a critical niche for a specific group of patients who previously had very few choices.

Ultimately, this research offers a new path forward for a difficult medical problem. By demonstrating that a modified use of residual penile skin can successfully rebuild a missing section of the urethra, the surgeons have provided a single-stage solution that avoids the need for more complex grafts from other parts of the body. While long-term data over five or ten years is still needed to confirm the durability of these repairs, the immediate results suggest that this technique is a safe and effective tool in the hands of experienced surgeons. For the men who have suffered this devastating injury, the ability to restore normal urinary function using their own remaining tissue represents a significant step toward recovery and quality of life.