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Hori et al. Mini-invasive Surg 2019;3:21 I http://dx.doi.org/10.20517/2574-1225.2019.15 Page 5 of 6

diagnostic step is to demonstrate a hole between the intradural space and the disc space. A few reports have
[9]
described discography for preoperative intradural LDH [9,10] . Benyamin et al. reported a case of intradural
LDH incidentally diagnosed during routine discography. In the present case, we performed discography to
distinguish intradural LDH from other spinal pathologies, such as neurinoma and arachnoid cyst, among
others.

In conclusion, preoperative diagnosis of intradural LDH is important for surgical planning. Physical
examination for intradural LDH is similar to that for common LDH. Image findings, especially via
discography, are important for establishing a definitive diagnosis of intradural LDH.

DECLARATIONS
Authors’ contributions
Conception and design: Hori T, Ohmori K
Clinical treatment: Hori T, Ohmori K, Ono K
Manuscript writing: Hori T
Final approval of manuscript: Hori T, Ohmori K

Availability of data and materials
Not applicable.

Financial support and sponsorship
None.

Conflicts of interest
All authors declared that there are no conflicts of interest.

Ethical approval and consent to participate
All procedures used in the present literature approved by the Ethical Committee of Nippon Koukan
Hospital. We obtained the patient’s consent for publication of the present literature.

Consent for publication
Not applicable.

Copyright
© The Author(s) 2019.

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