What does this research mean for the field?

Dorsal thoracic disc extrusion can mimic epidural tumors but may be distinguished by specific imaging features, such as continuity with a degenerated disc space and absence of a dural tail, and is associated with neurological improvement following posterior decompression. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To characterize the clinicoradiological presentation of dorsal epidural thoracic disc extrusions, identify MRI findings that distinguish them from neoplasms, and evaluate surgical outcomes.

August 19, 2026The International Journal of Spine SurgeryOpen Access

Clinical and Radiological Characteristics of Dorsal Epidural Extrusion of Thoracic Disc Herniation Mimicking Epidural Tumors: 2 Illustrative Cases and a Focused Literature Review

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To characterize the clinicoradiological presentation of dorsal epidural thoracic disc extrusions, identify MRI findings that distinguish them from neoplasms, and evaluate surgical outcomes.
Retrospective analysis of 2 institutional histologically confirmed cases pooled with a focused literature review of thoracic-only dorsal epidural extrusions (total N=16; 14 men, 2 women; median age 56.5 years).
Patients underwent posterior surgical decompression, with neurological recovery evaluated via the modified Frankel grade over a median follow-up of 4.5 months (range 0.1–30 months).
All 16 patients presented with thoracic myelopathy and achieved postoperative neurological improvement with no major complications, while complete recovery occurred in 31% (5/16 patients) under a conservative proxy definition.
Herniations occurred most frequently at T10–T11 (38%); contrast enhancement patterns were non-diagnostic, but continuity with a degenerated disc space, lack of a dural tail, and absence of homogeneous markedly high T2 signal favored disc extrusion over neoplasm.

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Implication

Retrospective review reveals neurological gains after posterior decompression in thoracic disc extrusion, indicating imaging features distinguish herniated fragments from epidural tumors.

Cite This Study

Kitahara et al. (2026) studied this question.

synapsesocial.com/papers/6a85633c03308d306e2d6422 https://doi.org/10.14444/8932

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Implication

Retrospective review reveals neurological gains after posterior decompression in thoracic disc extrusion, indicating imaging features distinguish herniated fragments from epidural tumors.

Clinical and Radiological Characteristics of Dorsal Epidural Extrusion of Thoracic Disc Herniation Mimicking Epidural Tumors: 2 Illustrative Cases and a Focused Literature Review

Key Points

Discussion

Implication

Cite This Study

Clinical and Radiological Characteristics of Dorsal Epidural Extrusion of Thoracic Disc Herniation Mimicking Epidural Tumors: 2 Illustrative Cases and a Focused Literature Review

Key Points

Discussion

Implication

Cite This Study

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