Abstract
Introduction: The surgical goal of pituitary surgery is gross total resection (GTR) of macroadenomas. Our group has previously reported that intraoperative magnetic resonance imaging (iMRI) may reveal unrecognized unacceptable residual tumor in 66% of patients undergoing trans-sphenoidal resection. A recent study demonstrated the feasibility of endoscopic trans-sphenoidal surgery with iMRI, with post-iMRI endoscopic confirmation of residual tumor location. We set out to evaluate the potential benefit of endoscopy on better visualization and pre-iMRI prediction accuracy of residual tumor presence and location during trans-sphenoidal surgery.
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