{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T10:05:35Z","timestamp":1780653935631,"version":"3.54.1"},"reference-count":12,"publisher":"Scientific Scholar","content-domain":{"domain":["surgicalneurologyint.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"\n Background:<\/jats:title>\n Retro-odontoid pannus is a reactive fibrocartilaginous mass that develops posterior to the odontoid process, causing ventral compression of the cervicomedullary junction. Although classically associated with rheumatoid arthritis, it is increasingly recognized in non-inflammatory conditions (e.g., diffuse idiopathic skeletal hyperostosis [DISH]) driven by chronic atlantoaxial instability. Over the past two decades, posterior stabilization alone has emerged as the preferred first-line approach, inducing spontaneous pannus regression by eliminating pathological motion.<\/jats:p>\n <\/jats:sec>\n \n Case Description:<\/jats:title>\n An 85-year-old male with DISH and extensive subaxial cervical ankylosis presented with severe occipital\/cervical pain. The magnetic resonance imaging (MRI) revealed a retro-odontoid soft-tissue mass that peripherally enhanced with gadolinium, resulting in cervicomedullary compression. Following an occipitocervical decompression\/fusion (C0\u2013C2), MRI 6 months later demonstrated spontaneous regression of the retro-odontoid mass.<\/jats:p>\n <\/jats:sec>\n \n Conclusion:<\/jats:title>\n Posterior occipitocervical stabilization readily addresses degenerative retro-odontoid pannus formation attributed to DISH and may resorb following C0-C2 fusion.<\/jats:p>\n <\/jats:sec>","DOI":"10.25259\/sni_477_2026","type":"journal-article","created":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T09:21:38Z","timestamp":1780651298000},"page":"339","update-policy":"https:\/\/doi.org\/10.25259\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Case of spontaneous regression of DISH-associated retro-odontoid pannus following occipto-cervical fusion"],"prefix":"10.25259","volume":"17","author":[{"given":"Andr\u00e9 Luiz","family":"Girotto","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, S\u00e3o Jos\u00e9 - Santa Casa de Porto Alegre, Porto Alegre, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guilherme Afonso","family":"Ludwig","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, S\u00e3o Jos\u00e9 - Santa Casa de Porto Alegre, Porto Alegre, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Camila Pereira","family":"de Souza","sequence":"additional","affiliation":[{"name":"Department of Medicine, School of Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guilherme da","family":"Rosa Raya","sequence":"additional","affiliation":[{"name":"Department of Medicine, School of Medicine, Federal University of Health Sciences of Porto Alegre, Porto Alegre, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alisson Roberto","family":"Teles","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, S\u00e3o Jos\u00e9 - Santa Casa de Porto Alegre, Porto Alegre, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"10894","published-online":{"date-parts":[[2026,6,5]]},"reference":[{"key":"10.25259\/SNI_477_2026\/ref-1","doi-asserted-by":"crossref","first-page":"585","DOI":"10.3171\/2023.5.JNS23677","article-title":"A novel classification and management scheme for craniocervical junction disorders with ventral neural element compression","volume":"140","author":"Algattas","year":"2024","journal-title":"J Neurosurg"},{"key":"10.25259\/SNI_477_2026\/ref-2","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1007\/s00381-025-06804-6","article-title":"Retro-odontoid mass resolution analysis and timing following posterior cervical spinal fixation: 16-year paediatric neurosurgery experience in a single UK institute","volume":"41","author":"Elmaghraby","year":"2025","journal-title":"Childs Nerv Syst"},{"key":"10.25259\/SNI_477_2026\/ref-3","doi-asserted-by":"crossref","first-page":"e170","DOI":"10.1016\/j.wneu.2021.03.155","article-title":"Retro-odontoid and retro-C2 body pseudotumor, pannus, and\/or cyst. A study based on analysis of 63 cases","volume":"151","author":"Goel","year":"2021","journal-title":"World Neurosurg"},{"key":"10.25259\/SNI_477_2026\/ref-4","doi-asserted-by":"crossref","first-page":"1431","DOI":"10.3899\/jrheum.181429","article-title":"Atlanto-axial pannus in patients with and without rheumatoid arthritis","volume":"46","author":"Joyce","year":"2019","journal-title":"J Rheumatol"},{"key":"10.25259\/SNI_477_2026\/ref-5","doi-asserted-by":"crossref","first-page":"3105","DOI":"10.1007\/s00586-018-5573-5","article-title":"Post-operative regression of retro-odontoid pseudotumors treated with and without fusion","volume":"27","author":"Kobayashi","year":"2018","journal-title":"Eur Spine J"},{"key":"10.25259\/SNI_477_2026\/ref-6","doi-asserted-by":"crossref","first-page":"762","DOI":"10.1007\/s00586-025-09129-9","article-title":"Risk factors for the development of retro-odontoid pseudotumor in non-rheumatoid arthritis patients with atlantoaxial subluxation: A multicenter cross-sectional study","volume":"35","author":"Kuroshima","year":"2025","journal-title":"Eur Spine J"},{"key":"10.25259\/SNI_477_2026\/ref-7","doi-asserted-by":"crossref","first-page":"1044","DOI":"10.5435\/JAAOS-D-20-01344","article-title":"Diffuse idiopathic skeletal hyperostosis of the spine: Pathophysiology, diagnosis, and management","volume":"29","author":"Le","year":"2021","journal-title":"J Am Acad Orthop Surg"},{"key":"10.25259\/SNI_477_2026\/ref-8","doi-asserted-by":"crossref","first-page":"578","DOI":"10.1097\/00007632-199903150-00016","article-title":"Spontaneous regression of periodontoid pannus mass in psoriatic atlantoaxial subluxation. Case report","volume":"24","author":"Lu","year":"1999","journal-title":"Spine (Phila Pa 1976)"},{"key":"10.25259\/SNI_477_2026\/ref-9","doi-asserted-by":"crossref","first-page":"741","DOI":"10.1038\/nrrheum.2013.165","article-title":"Diffuse idiopathic skeletal hyperostosis: Clinical features and pathogenic mechanisms","volume":"9","author":"Mader","year":"2013","journal-title":"Nat Rev Rheumatol"},{"key":"10.25259\/SNI_477_2026\/ref-10","doi-asserted-by":"crossref","first-page":"1763","DOI":"10.1097\/BRS.0000000000002222","article-title":"Postoperative regression of retro-odontoid pseudotumor after atlantoaxial posterior fixation: 11 years of experience in patients with atlantoaxial instability","volume":"42","author":"Park","year":"2017","journal-title":"Spine (Phila Pa 1976)"},{"key":"10.25259\/SNI_477_2026\/ref-11","doi-asserted-by":"crossref","first-page":"1511","DOI":"10.1007\/s00256-019-03187-z","article-title":"Thinking beyond pannus: A review of retro-odontoid pseudotumor due to rheumatoid and non-rheumatoid etiologies","volume":"48","author":"Shi","year":"2019","journal-title":"Skeletal Radiol"},{"key":"10.25259\/SNI_477_2026\/ref-12","doi-asserted-by":"crossref","first-page":"20035","DOI":"10.1038\/s41598-022-24436-7","article-title":"Changes in retro-odontoid mass after upper cervical spine surgery","volume":"12","author":"Shin","year":"2022","journal-title":"Sci Rep"}],"container-title":["Surgical Neurology International"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/surgicalneurologyint.com\/case-of-spontaneous-regression-of-dish-associated-retro-odontoid-pannus-following-occipto-cervical-fusion\/","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/surgicalneurologyint.com\/surgicalint-articles\/case-of-spontaneous-regression-of-dish-associated-retro-odontoid-pannus-following-occipto-cervical-fusion\/","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T09:21:40Z","timestamp":1780651300000},"score":1,"resource":{"primary":{"URL":"http:\/\/surgicalneurologyint.com\/surgicalint-articles\/case-of-spontaneous-regression-of-dish-associated-retro-odontoid-pannus-following-occipto-cervical-fusion\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,5]]},"references-count":12,"alternative-id":["10.25259\/SNI_477_2026"],"URL":"https:\/\/doi.org\/10.25259\/sni_477_2026","relation":{},"ISSN":["2152-7806","2229-5097"],"issn-type":[{"value":"2152-7806","type":"electronic"},{"value":"2229-5097","type":"print"}],"subject":[],"published":{"date-parts":[[2026,6,5]]},"article-number":"339"}}