Trichoblastic Sarcoma With Osteosarcomatous Differentiation
Bibliographic record
Abstract
Only one description of trichoblastic sarcoma exists in the literature. Here, we present the first case of trichoblastic sarcoma with heterologous osteosarcomatous differentiation. Biospy 1 demonstrated an intermediate-grade trichoblastic sarcoma with pleomorphic cells and atypical mitotic figures observed only in the stroma. The epithelium contained no malignant cells. The histologic morphology was reminiscent of an intermediate-grade phyllodes tumor of the breast. Biopsy 2, an excisional biopsy taken 7 months later, showed a high-grade sarcoma with osteosarcomatous differentiation. Immunohistochemistry performed on both specimens showed positive CD10 and bcl-2 staining in the sarcomatous component; p63 was positive in the benign epithelium only. p53 was negative in both the benign epithelium and the malignant stroma. Ki-67 labeling was approximately 10% in both components. Specimen 3, a complete rhinectomy performed 3 months later, showed a poorly differentiated sarcoma. Six months following his rhinectomy procedure, multiple pulmonary nodules consistent with metastatic disease were detected on chest computed tomography. This is the first case report documenting the evolution of an intermediate-grade trichoblastic sarcoma to a high-grade lesion with osteosarcomatous differentiation, to a poorly differentiated sarcoma. The tumor morphologically resembles malignant phyllodes tumor of the breast. Our case is the first to show negative p53 and positive bcl-2 staining in a trichoblastic sarcoma. We propose that cutaneous trichoblastic sarcoma is pathogenetically analogous to phyllodes tumors of the breast, adenosarcoma of the uterus, or ameloblastoma of the oral cavity.
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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".