Flexible Intramedullary Nailing of a Displaced Transverse Sternal Fracture Associated With a Flexion-Compression Injury of the Thoracic Spine
Bibliographic record
Abstract
STUDY DESIGN: A case report. OBJECTIVE: To report the successful surgical management of a patient with a displaced sternal fracture associated with flexion-compression injury to the thoracic spine by flexible intramedullary nailing of the sternum, thereby emphasizing the existence and clinical relevance of the concept of the fourth column of the thoracic spine. SUMMARY OF BACKGROUND DATA: Displaced sternal fractures resulting from indirect trauma are often associated with unstable injuries to the thoracic spine that require stabilization of the spine to prevent increasing kyphosis. The theory of the sternal-rib-complex as a possible fourth column giving structural support to the thoracic spine has been proposed. However, such a model has rarely been described, and the role of surgical stabilization of an unstable fourth column is unknown. METHODS: A 58-year-old man with Forestier syndrome presented with a severely displaced sternal fracture associated with an unstable injury to the thoracic spine at T4-T8 after a fall at ground level. The patient complained of sternal pain and respiratory distress. However, neurologically he was completely normal. His pain and respiratory distress improved, so he refused spinal stabilization, and was discharged 20 days after the injury. RESULTS: Eight weeks after the injury the patient complained of persistent sternal pain and symptoms of sternal instability. A computed tomogram (CT) showed increasing displacement of the sternal fracture and increasing kyphosis of the thoracic spine. To relieve the sternal pain and prevent further displacement the patient now agreed to stabilization of the sternal fracture by minimal invasive flexible intramedullary nailing. Postoperative CT showed an almost anatomically-reduced sternum and even a slight correction of the thoracic kyphosis. After removal of the implants 5 months later the patient was free of pain, and was able to resume normal physical activity and return to his work as a farmer. Thirty months after sternal stabilization surgery, CT showed complete healing of the sternal fracture and a continuing reduction of the thoracic kyphosis. CONCLUSION: This case supports the concept of the existence and clinical relevance of the fourth column of the thoracic spine, and its role in giving added spinal stability.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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".