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Endoscopic transsphenoidal surgery increases gross total resection rates for pituitary tumors compared to microscopic techniquesEndoscopic surgery shows higher removal rates for pituitary tumors

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Key Takeaway
Note that endoscopic transsphenoidal surgery provides higher gross total resection rates with comparable perioperative safety.

This meta-analysis evaluates the comparative efficacy and safety of endoscopic versus microscopic transsphenoidal pituitary surgery across a large sample size of 26,295 patients. The primary analysis focuses on gross total resection rates as the main outcome measure for surgical success in treating pituitary tumors.

The synthesis indicates that endoscopic surgery is associated with higher rates of gross total resection (RR 1.08; 95% CI 1.02-1.15). Regarding operative time, no significant difference was found between the two techniques (MD +3.57 min; 95% CI -17.25 to 24.40). While endoscopic surgery showed higher intraoperative blood loss (MD 44.0 mL; 95% CI 0.94-87.08), other safety metrics including cerebrospinal fluid leak, epistaxis, meningitis, diabetes insipidus, SIADH, and visual outcomes were comparable between both approaches.

The authors conclude that endoscopic surgery is associated with higher resection rates while maintaining comparable perioperative safety to microscopic surgery. These findings suggest that the choice of technique may impact surgical success without significantly impacting common perioperative complications.

When dealing with a pituitary tumor, the goal is to remove as much of the growth as possible. This type of surgery happens through the nose and sinuses, known as transsphenoidal surgery. Doctors often choose between two main techniques: microscopic surgery and endoscopic surgery.

A large review of data from over 26,000 patients shows that using an endoscope—a tool with a camera and light—leads to higher rates of gross total resection. This means surgeons are more likely to remove the entire tumor. While there was slightly more blood loss during endoscopic procedures, other safety risks like fluid leaks or infections were similar between both methods.

The time spent in the operating room did not differ significantly between the two techniques. Ultimately, the data suggests that endoscopic surgery provides a way to achieve better removal rates while maintaining a comparable level of safety for patients undergoing these procedures.

What this means for you:
Endoscopic surgery allows for higher tumor removal rates with similar safety levels compared to microscopic methods.

Common questions

Is endoscopic surgery safer than microscopic surgery for pituitary tumors?

Both methods show comparable perioperative safety. While endoscopic surgery resulted in slightly more blood loss (an average of 44.0 mL), other risks like cerebrospinal fluid leaks, nosebleeds, and infections were similar between both techniques.

Does the type of surgery affect how much of the tumor is removed?

Yes, the data shows higher rates of gross total resection in endoscopic surgery. This means surgeons using an endoscope are more likely to remove the entire tumor compared to those using a microscope.

Does one surgical method take much longer than the other?

No, there was no significant difference in operative time between endoscopic and microscopic surgery. The study found that both techniques took roughly the same amount of time to complete.

Study Details

Study typeMeta analysis
Sample sizen = 26,295
EvidenceLevel 1
PublishedJul 2026
View Original Abstract ↓
To compare surgical outcomes between endoscopic and microscopic transsphenoidal pituitary surgery using international comparative evidence and an institutional cohort. A PRISMA-based systematic review and meta-analysis of comparative transsphenoidal pituitary surgery studies was performed. Gross total resection was the primary endpoint. Secondary outcomes included operative time, intraoperative blood loss, cerebrospinal fluid leak, epistaxis, meningitis, diabetes insipidus, SIADH, and visual outcomes. Fixed- and random-effects models were applied. Fifty-six comparative studies including 26,295 patients from 23 countries were analyzed (13,575 endoscopic, 12,534 microscopic), supplemented by an institutional cohort of 142 patients. Endoscopic surgery was associated with higher gross total resection rates (random-effects RR 1.08, 95% CI 1.02-1.15). Operative time did not differ significantly between techniques (random-effects MD + 3.57 min, 95% CI - 17.25 to 24.40). Intraoperative blood loss was higher in endoscopic surgery (MD 44.0 mL, 95% CI 0.94-87.08). Rates of cerebrospinal fluid leak, epistaxis, meningitis, transient and permanent diabetes insipidus, SIADH, and postoperative visual deterioration or improvement were comparable between approaches. Both techniques demonstrate comparable perioperative safety, while endoscopic surgery seems to be associated with higher resection rates overall.
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