Rotationplasty type BIIIb as an effective alternative to limb salvage procedure in adults: Two case reports
Bibliographic record
Abstract
BACKGROUND: Rotationplasty is often performed for malignant tumors, but type BIIIb rotationplasty is rarely reported, and there needs to be more evidence of the procedure and treatment. The purpose of this case study was to report a new direction in the use of type BIIIb rotationplasty in treating patients with limb salvage and long-term non-healing infections. CASE SUMMARY: Case 1: A 47-year-old man underwent radiotherapy for hemangioendothelioma in his left thigh, resulting in a femoral fracture. Despite the use of plates, intramedullary nailing, and external fixators, the femoral bone failed to unite due to infectious nonunion. Multiple operations were unable to control the infection, leaving the patient immobile. We performed a modified tibia-pelvic-constrained hip rotationplasty, utilizing a constrained prosthetic hip between the tibia and pelvis following a femur resection. Two years post-surgery, the patient was able to walk with the prosthetic device without any signs of recurring infection. The corresponding functional scores were 72 points for the Musculoskeletal Tumor Society (MSTS), 53 for the Functional Mobility Assessment (FMA), 93 for the Toronto Extremity Salvage Score (TESS), and 56 for the MOS 36-item short form health survey (SF-36). Case 2: A 59-year-old woman presented with liposarcoma in her left thigh. Magnetic resonance imaging revealed tumors in the medial, anterior, and posterior femur muscles, encircling the femoral vessels and nerves. Fortunately, there were no symptoms of sciatic dysfunction, and the tumor had not invaded the sciatic nucleus. After one year of follow-up, the patient expressed satisfaction with limb preservation post-type BIIIb rotationplasty. The corresponding functional scores were 63 points for the MSTS, 47 for the FMA, 88 for the TESS, and 52 for the SF-36. CONCLUSION: Our study suggests that type BIIIb rotationplasty may be an alternative to amputation in patients with incurable infections. For malignant tumors of the lower extremities without invasion of the sciatic nerve, type BIIIb rotationplasty remains an excellent alternative to amputation. This surgical method may prevent amputation, improve functional outcomes, and facilitate biological reconstruction.
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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 | 0.003 | 0.018 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 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".