Primitive Nonneural Granular Cell Tumor (So-called Atypical Polypoid Granular Cell Tumor). Report of 2 Cases With Immunohistochemical and Ultrastructural Correlation
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Bibliographic record
Abstract
Primitive nonneural granular cell tumors (so-called atypical cutaneous granular cell tumors) were first described in 1991, followed by few case reports, and 2 recent larger series. We report here 2 additional cases in 2 women aged 73 and 74, who presented with 0.6- and 0.4-cm skin nodules on the right side of the jaw and the forearm, respectively. Biopsies showed cutaneous granular cell neoplasms with epithelioid morphology. The cells exhibited nuclear pleomorphism and brisk mitotic activity with atypical mitoses. Immunohistochemically, the tumor cells expressed vimentin and PGP 9.5 but lacked S-100 and CD34 expression. Ultrastructurally, both cases showed primitive cells packed with large secondary lysosomes. Primitive nonneural granular cell tumors seem to consist of neoplastic proliferating cells that fail to break down uncharacterized cellular material within the lysosomes. They are, however, different from classic granular cell tumor by lacking neural differentiation. Despite reported worrisome cellular atypia, these rare tumors seem to pursue a favorable outcome.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it