Light and Electron Microscopy of the Pagetoid Spread of Germ Cell Carcinoma in the Rete Testis: Morphologic Evidence Suggestive of Field Effect as a Mechanism of Tumor Spread
Bibliographic record
Abstract
The purpose of this study is to investigate the mechanism of tumor spread in the pagetoid spread of germ cell tumors in the rete testis (PSRT). Twenty consecutive cases of germ cell tumor of the testis (9 seminomas, 3 embryonal carcinomas, and 8 teratocarcinomas) were retrieved to identify the cases with PSRT. The areas of pagetoid spread were examined by the serial sectioning of the entire thickness of the tissue block. Available fresh tissue was submitted for electron microscopic study. Ten cases were associated with PSRT and had focal or extensive areas of intratubular germ cell neoplasia (IGCN) in the proximity of the tumor and the rete testis (RT). In the remaining 10 cases, 6 were associated with IGCN distant from the RT and the last 4 were not associated with IGCN. Seminiferous tubules with IGCN were seen connecting with the RT with pagetoid spread. Isolated single intraepithelial tumor cells also were identified at the periphery of the areas with PSRT. Electron microscopic study of the RT of 4 cases with PSRT (2 seminomas, 1 embryonal carcinoma, and 1 teratocarcinoma) revealed desmosome-type junctions between tumor cells with RT epithelial cells. Direct tumor expansion and cell motility as mechanisms of tumor spread in PSRT does not explain the presence of isolated cells and desmosome-type junctions of the tumor cells as demonstrated in this study. The authors believe that the field effect plays an important part in the pathogenesis of this pagetoid spread in the RT. It is likely that this field effect is induced by the germ cell tumor and is operated through the immature germ cells or undifferentiated epithelial cells in the RT adjacent to the tumor cells.
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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) | 0.001 | 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".