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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 20:1373-1377 (8 1999)
© 1999 American Society of Neuroradiology

ARTICLE

Intraspinal Extradural Cysts Communicating with Adjacent Herniated Disks: Imaging Characteristics and Possible Pathogenesis

Kinuko Kono^a, Hiroaki Nakamura^a, Yuichi Inoue^a, Terue Okamura^a, Miyuki Shakudo^a and Ryusaku Yamada^a

^a From the Departments of Radiology (K.K., Y.I., T.O., M.S., R.Y.) and Orthopedics (H.N.), Osaka City University Medical School, 1–5–7 Asahimachi, Abeno, Osaka 545–8585 Japan.

Summary: We report two cases of intraspinal extradural cysts communicating with an adjacent herniated disk that we term "disk cysts." These cysts were well defined and homogeneous, and were present in the ventrolateral extradural space adjacent to a lumbar herniated disk. They had rim enhancement on contrast-enhanced MR images, and communication with a herniated disk was revealed by diskography.

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