Evidence map›Paper›PMID 34435157›Full record

ArticleSpine surgery and related research2021

Intradural Disc Herniation Concurrent with Ossification of the Posterior Longitudinal Ligament, Ossification of the Ligamentum Flavum, and Cauda Equina Schwannoma at the L1-L2 Level: A Case Report.

Masayuki Tanabe, Satoshi Ogihara, Shunpei Iida, Satoshi Ikemune, Jun Kikuchi, Kazuo Saita

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Spine surgery and related research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Article
  2. Rare intradural lumbar disc herniation at L1/2: a case report.Journal of spine surgery (Hong Kong) · 2026
    Article
  3. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Masayuki TanabeDepartment of Orthopaedic Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan.
Satoshi OgiharaDepartment of Orthopaedic Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan.
Shunpei IidaDepartment of Orthopaedic Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan.
Satoshi IkemuneDepartment of Orthopaedic Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan.
Jun KikuchiDepartment of Pathology, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan.
Kazuo SaitaDepartment of Orthopaedic Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

PubMed holds no abstract for this paper.

Indexed as

cauda equina syndromelumbar disc herniationossification of the ligamentum flavumossification of the longitudinal ligamentschwannoma

Identifiers

PMID34435157
PMCPMC8356230

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.