An uncommon folliculosebaceous cystic hamartoma on the lower extremity
Bibliographic record
Abstract
BACKGROUND: Folliculosebaceous cystic hamartomas (FSCH) are a recently recognized cutaneous hamartoma comprised of follicular, sebaceous and mesenchymal elements. Only nine cases have been previously reported. The authors present a case of FSCH on the lower extremity in addition to a literature review. OBJECTIVE: To further characterize the clinical, histological and immunohistological features of FSCH. METHODS: The clinical, histological and immunohistological features of FSCH were evaluated and the literature reviewed. RESULTS: This lesion uncommonly presents as exophytic papules or nodules on the leg, and most commonly presents on the central part of the face. Clinical differential diagnoses included nevus, neurofibroma and adnexal tumour. The diagnostic microscopic features of infundibular cystic structures with attached sebaceous glands and characteristic stroma were present in all lesions. Many of the stromal spindle cells were CD34-positive. CONCLUSION: The FSCH is a recently recognized hamartoma comprised of follicular, sebaceous and mesenchymal elements. Although reported only rarely, its incidence is likely much higher. In the present patient, the FSCH was located in femoral region, which is very rare.
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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 | 0.001 | 0.003 |
| 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) | 0.001 | 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".