{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,7]],"date-time":"2026-11-07T02:25:11Z","timestamp":1794018311196,"version":"4.8.0"},"reference-count":37,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,10,1]]},"abstract":"<jats:sec>\n                    <jats:title>OBJECTIVE<\/jats:title>\n                    <jats:p>MRI-negative Cushing disease is challenging to treat due to difficulty with tumor localization and lower biochemical remission rates. Surgeons primarily rely on visual and tactile feedback to identify abnormal pituitary tissue. In this study, the authors analyzed intraoperative sketches of histology-confirmed corticotroph adenomas to compare the spatial distributions of MRI-positive and MRI-negative tumors. By characterizing these distribution patterns, the authors aimed to improve the localization and surgical targeting of MRI-negative pathology.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS<\/jats:title>\n                    <jats:p>The authors retrospectively reviewed patients with Cushing disease who underwent microscopic transsphenoidal resection by the late Dr. Edward H. Oldfield at the authors\u2019 institution from December 2007 to March 2017. Patients were stratified into MRI-positive and MRI-negative cohorts. A standardized pituitary sketch visualizing both coronal and sagittal planes was used for postoperative documentation. For every patient, Dr. Oldfield annotated the anatomical location of the histologically confirmed corticotroph adenoma. Image acquisition, processing, and heat map\u2013based spatial analysis were performed to assess cumulative tumor density. Spatial differences were evaluated with cluster-based correction for multiple comparisons. Surgical outcomes were then compared between the 2 cohorts.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS<\/jats:title>\n                    <jats:p>A total of 153 patients with Cushing disease and histologically confirmed pituitary corticotroph adenoma (133 MRI-positive and 20 MRI-negative adenomas) were analyzed. Baseline demographic and biochemical characteristics were similar across MRI status. Both cohorts demonstrated similar anatomical presentation, with over 50% of patients presenting with corticotroph adenomas in the anterior aspect of the pituitary gland. MRI-positive tumors were more likely to localize to the lateral and dorsal aspects of the anterior pituitary (p &lt; 0.05). In contrast, MRI-negative adenomas showed no distinct area of increased prevalence. Postoperatively, the MRI-negative cohort had higher nadir cortisol levels (2.9 vs 1.5 \u03bcg\/dl, p = 0.001) and increased reoperation rates (20% vs 3.8%, p = 0.027). Remission rates were lower in MRI-negative patients but not statistically significant (75.0% vs 91.0%, p = 0.050).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSIONS<\/jats:title>\n                    <jats:p>MRI-negative corticotroph adenomas were less frequently localized in the lateral and dorsal aspects of the anterior pituitary compared to MRI-positive tumors, with no distinct region of increased prevalence. These findings support a unique surgical strategy that leverages the anatomical distribution of histologically confirmed adenomas to guide gland exploration and resection of hidden tumors. While these observations may provide anatomical context for surgical exploration in radiographically occult disease, operative decision-making should remain guided by intraoperative findings and individual patient anatomy.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/2026.5.jns252620","type":"journal-article","created":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T00:00:57Z","timestamp":1791936057000},"page":"1-10","source":"Crossref","is-referenced-by-count":0,"title":["Spatial localization patterns in MRI-negative Cushing disease: a comparative pituitary heat map analysis"],"prefix":"10.3171","author":[{"given":"Richard J.","family":"Chung","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, University of Virginia, Charlottesville;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oumou Kalsoum","family":"Mbacke","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Virginia, Charlottesville;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xue","family":"Feng","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, University of Virginia, Charlottesville;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Georgios A.","family":"Maragkos","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Virginia, Charlottesville;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonathan","family":"Yun","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Virginia, Charlottesville;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kristine","family":"Ravina","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Carilion Clinic, Roanoke;"},{"name":"Virginia Tech Carilion School of Medicine, Roanoke;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tanvika","family":"Vegiraju","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Virginia, Charlottesville;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. Beatriz","family":"Lopes","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Virginia, Charlottesville;"},{"name":"Department of Neuropathology, University of Virginia, Charlottesville; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John A.","family":"Jane","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Carilion Clinic, Roanoke;"},{"name":"Virginia Tech Carilion School of Medicine, Roanoke;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael P.","family":"Catalino","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Virginia, Charlottesville;"},{"name":"Department of Medicine, Division of Endocrinology and Metabolism, University of Virginia, Charlottesville, Virginia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"4","key":"b1","series-title":"Clin Endocrinol (Oxf)","first-page":"502","article-title":"A change in pituitary magnetic resonance imaging protocol detects ACTH-secreting tumours in patients with previously negative results","volume":"72","author":"Chowdhury IN","year":"2010","unstructured":"Chowdhury IN, Sinaii N, Oldfield EH, Patronas N, Nieman LK. A change in pituitary magnetic resonance imaging protocol detects ACTH-secreting tumours in patients with previously negative results. Clin Endocrinol (Oxf). 2010;72(4):502\u2013506. doi:10.1111\/j.1365-2265.2009.03646.x"},{"issue":"4","key":"b2","series-title":"J Clin Endocrinol Metab","first-page":"1565","article-title":"Spoiled gradient recalled acquisition in the steady state technique is superior to conventional postcontrast spin echo technique for magnetic resonance imaging detection of adrenocorticotropin-secreting pituitary tumors","volume":"88","author":"Patronas N","year":"2003","unstructured":"Patronas N, Bulakbasi N, Stratakis CA,  Spoiled gradient recalled acquisition in the steady state technique is superior to conventional postcontrast spin echo technique for magnetic resonance imaging detection of adrenocorticotropin-secreting pituitary tumors. 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