Day-one MRI after pituitary surgery shows 93% sensitivity for spotting leftover tumor

The timing of MRI following transsphenoidal pituitary adenoma resection to detect residual tumour is contentious, according to the review's background. A new systematic review and meta-analysis, published in Acta Neurochirurgica, evaluated the diagnostic utility of magnetic resonance imaging performed on the first day after transsphenoidal pituitary adenoma resection to predict residual disease. Pooling data from seven studies involving 449 patients, the researchers found that immediate post-surgery MRI detected residual tumor with a sensitivity of 93.4 percent and a specificity of 95.0 percent.

The timing of postoperative imaging in this field has long been contentious.

The review included seven studies with a combined total of 449 patients with pituitary adenoma. Beyond the headline sensitivity of 93.4 percent, with a 95 percent confidence interval of 85.9 to 97.1 percent, and specificity of 95.0 percent, with a confidence interval of 87.1 to 98.2 percent, the analysis reported a Youden's J statistic of 0.884 [CI: 0.813 – 0.956]. The analysis reported a positive likelihood ratio of 18.73, a negative likelihood ratio of 0.07, and a diagnostic odds ratio of 269. The diagnostic odds ratio had a very wide confidence interval, reported as 269 [CI: 0 – 46249785%].

The diagnostic odds ratio had a very wide confidence interval, reported as 269 [CI: 0 – 46249785%]. The authors' conclusion states that there is a paucity of literature surrounding the utility of early MRI to inform further surgical re-exploration and the influence on long-term disease remission. Their conclusion states plainly that immediate post-surgery MRI has excellent diagnostic characteristics to detect residual tumor after pituitary surgery, yet there is a paucity of literature surrounding the utility of early MRI to inform further surgical re-exploration and the influence on long-term disease remission.

The study appears as a peer-reviewed, accepted manuscript shared early with a permanent DOI, a format the journal uses to speed access to findings before final version-of-record edits. It is open access, and the article had recorded 42 accesses at the time of indexing.

Day-one MRI performed well as a diagnostic test for residual adenoma in the pooled analysis, with a sensitivity of 93.4 percent and a specificity of 95.0 percent across the seven included studies. The authors' conclusion states that there is a paucity of literature surrounding the utility of early MRI to inform further surgical re-exploration and the influence on long-term disease remission.

Subject of Research: Diagnostic accuracy of immediate post-operative MRI for detecting residual pituitary adenoma after transsphenoidal surgery

Article Title: Immediate post-surgery MRI following pituitary adenoma resection: a systematic review and meta-analysis of diagnostic utility

Article References: Latif, J., Lenders, N., McCormack, A., Jonker, B., Winder, M., Di Ieva, A., Choy, C., Alvarado, R., Campion, N., Sacks, P.-L., Campbell, R., Kalish, L., & Harvey, R. (2026). Immediate post-surgery MRI following pituitary adenoma resection: a systematic review and meta-analysis of diagnostic utility. Acta Neurochirurgica. https://doi.org/10.1007/s00701-026-07056-2

Image Credits: AI Generated

DOI: 10.1007/s00701-026-07056-2

Keywords: pituitary adenoma, transsphenoidal surgery, postoperative MRI, systematic review, meta-analysis, residual tumor, diagnostic accuracy, sensitivity, specificity, neurosurgery, Acta Neurochirurgica, Immediate