{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,6]],"date-time":"2026-06-06T08:07:12Z","timestamp":1780733232636,"version":"3.54.1"},"reference-count":30,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2015,4,23]],"date-time":"2015-04-23T00:00:00Z","timestamp":1429747200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Neuroimaging"],"published-print":{"date-parts":[[2015,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>BACKGROUND<\/jats:title><jats:p>Arachnoid cysts and meningeal membranes are among the differential diagnostic considerations of extra\u2010medullary causes of thoracic myelopathy. In this case series of 7 patients, we present compressive meningeal membranes mimicking dorsal arachnoid cyst. The propensity of the meningeal membranes for the dorsal aspect of upper thoracic spine may reflect derangements of the septum posticum.<\/jats:p><\/jats:sec><jats:sec><jats:title>OBJECTIVE<\/jats:title><jats:p>To provide the spectrum of imaging appearances and clinical presentations of pathology of the septum posticum to improve imaging utilization and to better guide treatment planning.<\/jats:p><\/jats:sec><jats:sec><jats:title>METHODS<\/jats:title><jats:p>Seven patients aged 40 to 75 with MRI findings of ventral displacement and dorsal cord compression in the upper thoracic spine were further evaluated with CT\u2010myelograms. The primary indication was to exclude dorsal arachnoid cyst. Two patients with progressive symptoms and lower extremity weakness were operated for decompression.<\/jats:p><\/jats:sec><jats:sec><jats:title>RESULTS<\/jats:title><jats:p>CT\u2010myelogram excluded space occupying lesions and cord herniation in all cases. Intradural dorsal meningeal webs and membranes were inconsistently visualized. In the 2 operated cases, thick coalescing membranes and hyperdynamic turbulent CSF flow were severely compressing the thoracic cord.<\/jats:p><\/jats:sec><jats:sec><jats:title>CONCLUSION<\/jats:title><jats:p>Derangements of septum posticum may present a spectrum of findings that should be considered in the differential of thoracic myelopathy. Flattening of the posterior cord margin is a reliable imaging clue for a dorsal extra\u2010medullary compressive lesion. Cord compression results from combination of adhesive membranes and turbulent CSF flow. The clinical course may be difficult to predict. Periodic imaging follow up can be helpful to confirm stability of findings in expectantly managed cases.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jon.12243","type":"journal-article","created":{"date-parts":[[2015,4,23]],"date-time":"2015-04-23T08:39:18Z","timestamp":1429778358000},"page":"818-823","source":"Crossref","is-referenced-by-count":13,"title":["The Neuroimaging Spectrum of Septum Posticum Derangement and Associated Thoracic Myelopathy"],"prefix":"10.1111","volume":"25","author":[{"given":"Michael M.","family":"Hakky","sequence":"first","affiliation":[{"name":"Department of Radiology Lahey Clinic Medical Center  Burlington Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Almamoon I.","family":"Justaniah","sequence":"additional","affiliation":[{"name":"Department of Radiology Beth Israel Deaconess Medical Center  Boston Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos","family":"David","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery Lahey Clinic Medical Center  Burlington Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert J.","family":"French","sequence":"additional","affiliation":[{"name":"Department of Radiology Lahey Clinic Medical Center  Burlington Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dann","family":"Martin","sequence":"additional","affiliation":[{"name":"Department of Radiology Lahey Clinic Medical Center  Burlington Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nathan","family":"Kwok","sequence":"additional","affiliation":[{"name":"Tufts University School of Medicine  Boston Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sami H.","family":"Erbay","sequence":"additional","affiliation":[{"name":"Department of Radiology Lahey Clinic Medical Center  Burlington Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2015,4,23]]},"reference":[{"key":"e_1_2_10_2_1","first-page":"589","article-title":"The diagnostic impact of magnetic resonance imaging on the evaluation of suspected spinal cord disease","volume":"104","author":"Offenbacher H","year":"1991","journal-title":"Wien klin Wochenschr"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1186\/1757-1626-2-7531"},{"key":"e_1_2_10_4_1","doi-asserted-by":"crossref","first-page":"573","DOI":"10.1016\/S1064-9689(21)00576-6","article-title":"MR imaging of cerebrospinal fluid flow and spinal cord motion in neurologic disorders of the spine","volume":"7","author":"Levy LM","year":"1999","journal-title":"Magn Reson Imaging Clin N Am"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1590\/S0004-282X2005000500026"},{"key":"e_1_2_10_6_1","first-page":"90","article-title":"Extradural spinal arachnoid cyst occurring in a child: a case report","volume":"24","author":"Bakhti S","year":"2014","journal-title":"Turkish Neurosurg"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.3171\/spi.2000.93.2.0287"},{"key":"e_1_2_10_8_1","volume-title":"Studien en der Anatomie des Nervensystems und des Bindegewebes","author":"Key A","year":"1875"},{"key":"e_1_2_10_9_1","unstructured":"HE Jordan 1920 D. 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