An Aneurysmal Bone Cyst in the Cervical Spine of a 10-Year-Old Girl: A Case Report
Bibliographic record
Abstract
In Brief Study Design. An aneurysmal bone cyst in the neural arch of the fourth cervical vertebra of a 10-year-old girl is reported, along with a brief review of the literature on the topic. Objective. To report the presentation and diagnosis of this disorder along with a discussion of the major pitfalls of treatment. Summary of Background Data. An aneurysmal bone cyst occurs commonly in the second decade, with a predilection for the lumbar spine. With occurrence in the neural arch of a cervical vertebra, the potential for instability following surgical excision is high. Methods. A 10-year-old white female presented with neck pain of 3 months’ duration. Diagnostic imaging revealed an expansile lytic lesion in the spinous process and lamina of the fourth cervical vertebra. Surgical treatment consisted of excisional biopsy and a segmental instrumented posterior fusion from C3–C5. The histopathology was consistent with an aneurysmal bone cyst. Results. Surgical excision consisting of laminectomy and instrumented segmental fusion provided a good clinical result, and minimized the risk and degree of the 2 most common complications: recurrence of the tumor; and postlaminectomy kyphosis, a frequent occurrence in the pediatric population. Conclusions. In pediatric patients who develop a bone tumor of the posterior elements of the cervical spine, careful clinical and radiologic evaluation is necessary to narrow the differential diagnosis. In most cases, a complete excision should be performed if possible. The risk of postlaminectomy kyphosis is high in the pediatric age population. As such, a fusion should be considered whenever a laminectomy is performed in the immature cervical spine. Risk factors for kyphosis include a high cervical level, multiple laminectomy levels, and postoperative irradiation. The risk of postlaminectomy kyphosis associated with aneurysmal bone cyst treatment is high in the pediatric population. As such, a fusion should be considered whenever a laminectomy is performed in the immature cervical spine. Risk factors for kyphosis include a high cervical level, multiple laminectomy levels, and postoperative irradiation.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".