Basal Cell Carcinoma With Matrical Differentiation: A Case Report and Literature Review
Bibliographic record
Abstract
Basal cell carcinoma (BCC) with matrical differentiation is an extremely rare subtype of basal cell carcinoma. We present an example of BCC with matrical differentiation and review the relevant literature. A 75-year-old man presented with a rapidly enlarging nodule on his forehead, with the clinical diagnosis of squamous cell carcinoma. Given atypical matrical proliferation on initial biopsy, there was concern for pilomatrix carcinoma. However, a repeat biopsy confirmed a diagnosis of BCC with matrical differentiation. Immunohistochemically, the BCC lobules expressed BCL2 and BER-EP4, while the areas of matrical differentiation showed nuclear β-catenin expression. The tumor cells were negative for keratin 7. BCC with matrical differentiation predominantly affects men, with a mean age of 70 years. Most tumors occur in the head and neck area, and lesions are often slow-growing or asymptomatic. Differential diagnosis includes pilomatrix carcinoma. Outcomes are generally favorable following surgical excision, although 2 instances of lymph node metastasis have been reported.
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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".