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Intraspinal extradural cysts communicating with adjacent herniated disks: imaging characteristics and possible
1Department of Radiology, Osaka City University Medical School, Osaka, Japan.
AJNR. American Journal of Neuroradiology
|September 3, 1999
Summary
We describe two cases of intraspinal extradural cysts connected to herniated discs, termed "disk cysts." These cysts were located next to lumbar herniated discs and showed specific imaging characteristics.
Area of Science:
- Neurosurgery
- Radiology
- Spinal Imaging
Background:
- Intraspinal extradural cysts are rare and can be associated with various spinal pathologies.
- Understanding the origin and imaging features of these cysts is crucial for accurate diagnosis and management.
Observation:
- Two cases of intraspinal extradural cysts were identified.
- These cysts were located in the ventrolateral extradural space adjacent to a lumbar herniated disk.
- The cysts were well-defined, homogeneous, and exhibited rim enhancement on contrast-enhanced MRI.
Findings:
- The term "disk cysts" is proposed for these specific lesions.
- Communication between the extradural cysts and the adjacent herniated disk was confirmed via diskography.
- Imaging findings suggest a direct relationship between the herniated disc and cyst formation.
Implications:
- This finding expands the understanding of spinal cyst etiologies.
- Disk cysts may represent a distinct entity requiring specific diagnostic and therapeutic considerations.
- Further research is warranted to elucidate the pathogenesis and clinical significance of disk cysts.