• Journal of the Korean Society of Radiology
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• v.85 no.1
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• pp.3-23
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• 2024

Intervertebral disc herniation is frequently encountered in radiological practice. Sequestered disc herniation occurs when the disc material undergoes degeneration and completely loses continuity with the parent nucleus pulposus. Sequestered discs can reside within and outside the spinal canal, exerting a mass effect on adjacent structures, compressing nerve pathways, and eliciting a range of clinical symptoms. In particular, sequestered discs within the dura cannot be identified without durotomy. Therefore, precise preoperative localization is crucial for surgical planning. On MRI, the signal intensity of the sequestered disc may vary due to independent degeneration processes. Additionally, most sequestered disc fragments show varying degrees of peripheral enhancement depending on the degree of angiogenesis and granulation around the isolated tissue. In this article, we review various imaging findings and the location of the sequestered disc to provide patients with an accurate diagnosis and appropriate treatment direction.

• Journal of Korean Neurosurgical Society
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• v.41 no.2
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• pp.137-140
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• 2007

HNP [Herniation of the necleus pulposus] generally occurs at ventral portion of lumbar thecal sac due to the anatomical position. We report two unusual cases of herniated dorsal portion of lumbar thecal sac causing diagnostic difficulties. Two patients with posteriorly migrated epidural disc fragments were evaluated with plain X-ray, and magnetic resonance imaging. These patients responded well to operation with complete relief of symptoms. Definite diagnosis of posteriorly located disc fragments is difficult because the radiological images of disc fragments may mimic those of other more common posterior epidural lesions.

• Journal of Korean Neurosurgical Society
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• v.29 no.10
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• pp.1340-1344
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• 2000

Objective : A prospective biochemical assay of prostaglandin $E_2$ content in symptomatic lumbar disc materials was done in order to clarify the pathogenesis of lumbar radiculopathy. Patients and Methods : Forty-eight disc specimens were purified by a standard solid-phase extraction procedure and analyzed by an enzymelinked immunosorbent assay for prostaglandin $E_2$. Clinical and anatomic correlations were evaluated with analysis of variance and t-test. Results : Acute herniated lumbar disc diseases tended to be associated with a higher prostaglandin $E_2$ content than degenerative lumbar disc disease. Sequestered discs tended to be associated with a higher prostaglandin $E_2$ content than extruded discs, which also showed higher prostaglandin $E_2$ content than protruded ones. A sciatica and positive straight leg raising test appeared to be associated with a higher prostaglandin $E_2$ content than a negative test. Conclusion : This result suggests that the level of prostaglandin $E_2$ would be correlated with clinical symptom and sign in the inflammatory process of lumbar disc herniation.

• The Journal of Korea CHUNA Manual Medicine
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• v.3 no.1
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• pp.43-53
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• 2002

Objectives : The object is to study a clinical effect regarding the conservative treatment of the patient who was diagnosed as the herniated Intervertebral lumbar disc(HIVD) and hospitalized in the oriental medical hospital and clinical study about the type of the HIVD. Methods. The clinical studies were done on 65 cases (hospitalized in Dept. of Oriental Rehabilitation Medicine, jaseng on oriental medical hospital from June 2001 to May 2002) who complained of low back pain or sciatica and diagnosed as HIVD on CT(computerized tomography) or MRI(magnetic resonance imaging). They were given both oriental conservative treatment and exercise during the hospitalization period. We investigated and observed 20 items about sex, age, weight, height, occupation, smoking. obesity, duration of disease, clinical symptom and treatment duration in basis of medical recording which was drawn up at patient hospitalization. We classified HIVD with 4 types(Bulging. Protruded. Extruded, Sequestered) and decided the case which simultaneously had 2 overs with Mixed type. The treatment evaluation standard was classified with 4 branches; Excellent. Good, Fair and Poor. Results & Conclusions : The treatment result of over 'fair' is bulging type 85%, protruded type 92.7%, extruded type 100% and the mixed type was 85.1 %. The effect was good in order of bulging, mixed, protruded and extruded type. It appeared most plentifully with 30 people in L4-5 and L5-S 1 disc herniation type.