Presumptive intramedullary intervertebral disc extrusion in 12 cats: clinical presentation, MRI findings, treatment and outcome
Bibliographic record
Abstract
ObjectivesThis study aimed to describe the clinical characteristics, MRI findings, treatment and outcome in cats presumptively diagnosed with intramedullary intervertebral disc extrusions.MethodsA retrospective review was conducted of medical records and MRI data from cats presumptively diagnosed with intramedullary intervertebral disc extrusions. Long-term outcome (⩾6 months) was assessed through medical records, questionnaires completed by the owners or both.ResultsA total of 12 cats met the inclusion criteria. All presented with peracute or acute clinical signs, with nine having confirmed (n = 3) or possible (n = 6) external trauma based on history, physical examination or MRI findings. Seven cats were ambulatory and five were non-ambulatory. Eight cats presented with urinary incontinence; none exhibited faecal incontinence. Neuroanatomical localisation included the T3-L3 (n = 7) and L4-S3 (n = 5) spinal cord segments. MRI showed an intramedullary intervertebral disc extrusion at the following sites: T12-T13 (n = 1), T13-L1 (n = 1), L1-L2 (n = 2), L2-L3 (n = 2), L4-L5 (n = 3) and L5-L6 (n = 3). All cats underwent treatment and were discharged after a median hospitalisation time of 4 days (range 3-14). All non-ambulatory cats with available follow-up information (4/5) regained ambulation by the time of the short-term (<6 weeks) or long-term (⩾6 months) assessment. Moreover, all cats either retained or regained urinary continence by the time of discharge, the short-term (<6 weeks) or the long-term (⩾6 months) assessment. Overall, nine cats achieved a successful outcome and were considered functional pets at the short-term (<6 weeks) and/or long-term (⩾6 months) follow-up. Two cats were lost to follow-up, and one cat had perceived persistent generalised discomfort.Conclusions and relevanceMost cats presumptively diagnosed with an intramedullary intervertebral disc extrusion showed a favourable outcome with treatment in this study. This condition should be considered in cats presenting with peracute or acute signs of T3-L3 or L4-S3 spinal cord dysfunction, especially if there is a history or indication of trauma.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".