A new systematic review and meta-analysis published in World Neurosurgery is shedding light on a question that has recently challenged spine surgeons: when it comes to repairing spontaneous spinal cerebrospinal fluid (CSF) leaks, does minimally invasive surgery yet measure up to traditional open repair?
The answer, according to senior author and Weill Cornell Medicine neurosurgeon, Chief of Neurological Surgery at NewYork-Presbyterian Queens and Co-director of the Weill Cornell Medicine CSF Leak Program, Dr. John Park, is increasingly yes — and the implications for patients could be significant.
A Common Condition, A Difficult Diagnosis
Spontaneous spinal CSF leaks are a major cause of spontaneous intracranial hypotension, a condition that produces debilitating orthostatic headaches, headaches that worsen when sitting or standing and improve when lying down. Patients often endure prolonged diagnostic delays before the underlying leak is found and definitively treated.
Once localized, surgical repair has long been the gold standard. But the question of how to operate has been evolving, especially with the increasing use of minimally invasive surgical techniques.
From Open to Minimally Invasive: A Shift Driven by Patients
For Dr. Park, the motivation to explore minimally invasive techniques came directly from his patients. "When we started the CSF leak program, I was using open surgery — making a three to four inches long skin incision and muscle dissection to make sure we had adequate localization and exposure of the leak," he explained. "And I realized the patients had quite a bit of pain and discomfort after surgery, especially from the muscle dissection."
Drawing on well-established principles in other types of spine surgery, Dr. Park began applying intraoperative CT guidance and tubular retractor technology— the same approaches used in minimally invasive discectomies and fusions — to CSF leak repair. The use of intraoperative CT guidance allows us to precisely localize the site of the leak. Because of this degree of accuracy and the use of tubular retractors, the skin incisions now need to be less than an inch and a half and there is minimal muscle dissection. The difference for patients has been immediate. "They go home the next day. They have minimal pain and discomfort from the surgery itself. The patients have been much happier."
Seeing strong results in his own practice, Dr. Park and his colleagues set out to understand what the broader literature had to say.
What the Research Found
The study, co-authored with Dr. Gayle Salama, Co-director of the Weill Cornell Medicine CSF Leak Program, and W. Elorm Yevudza Jnr, analyzed 20 studies published between 2010 and 2025, synthesizing outcomes data from surgical series across a range of techniques. Nine studies contributed to a formal quantitative meta-analysis.
The findings were encouraging. Overall, primary closure success — meaning the leak was durably repaired — was achieved in 95% of patients across all approaches. Recurrence or reoperation occurred in approximately 10% of cases. When broken down by approach, MIS and open techniques showed numerically similar results: closure rates of 97% versus 92%, and recurrence rates of 10% versus 9%, respectively — differences that were not statistically significant.
Perhaps equally important, cohorts using minimally invasive approaches consistently reported shorter hospital stays and less postoperative pain compared to traditional open series.
"The problem we found is that there aren't many other surgeons or papers out there describing the minimally invasive technique to really say if it's better or worse," Dr. Park said. "If you want to compare two things, you have to have enough of each to make a valid comparison."
That gap in the literature was, in fact, one of the paper's more striking findings. "What surprised me is how few people are doing minimally invasive repairs," Dr. Park noted. "Typically the number of publications is proportional to the number of people doing something — and the fact that there are so few publications is reflective of this."
What This Means for Patients Today
Despite those caveats, Dr. Park's clinical approach has shifted. "I now exclusively recommend having a leak fixed through a tube," he said. "Our own results so far are comparable to open surgery, and we know that it's less pain and discomfort for patients. Our success rate for fixing the leaks has been extremely high."
The results at Weill Cornell Medicine speak for themselves — including one patient who underwent minimally invasive CSF leak repair and was dancing at his wedding shortly thereafter.
Looking Ahead
For Dr. Park, this paper is a starting point, not a conclusion. As the program at Weill Cornell Medicine continues to grow its experience with tubular repair, the goal is to accumulate enough cases to produce a more comprehensive, validated analysis of outcomes that could help establish minimally invasive surgery as the standard of care for appropriate patients.
"We want to demonstrate that this is a viable and successful method," he said. "And I think the more cases we do, the more our technique will be validated."
The paper, "Minimally Invasive Versus Traditional Repair of Spinal Cerebrospinal Fluid Leaks: A Systematic Review and Meta-Analysis," is published in the June 2026 issue of World Neurosurgery and is available online now.