Spontaneous Pituitary Adenomas of the Pars Intermedia in 5 Aged Horses: Histopathological, Immunohistochemical and Ultrastructural Studies.
Bibliographic record
Abstract
Adenomas that developed in the pars intermedia of 1 Anglo-Arab and 4 thoroughbred horses aged 19 to 29 years were examined by light microscopy, electron microscopy and immunohistochemistry. The tumors had a nodular growth pattern separated by connective tissue and often invaded the pars nervosa irregularly. The tumor cells were spindle cells with abundant basophilic cytoplasm and proliferated in a palisade arrangement in line with the blood capillaries. Histochemically, the tumor cells were stained light red with periodic acid-Schiff-Orange G stain and purple with aldehyde thyonine, thereby showing a chromatic similarity to basophilic cells of the normal pars intermedia and the pars distalis. Immunohistochemically, the tumor cells were positive for adrenocorticotropic hormone (ACTH) and also weakly positive for α-melanocyte stimulating hormone (α-MSH), β-lipotropin (β-LPH) and β-endorphin (β-END). Since these hormones are synthesized from the prohormone, proopiomelanocortin (POMC), it has been suggested that the tumor cells may have a POMC-producing structure. But the tumor cells were positive for proliferating cell nuclear antigen, and this tumor appeared to be a nonfunctional pituitary tumor because no cell atypia or exocytosis was found ultrastructually.
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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 | 0.002 | 0.006 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.004 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| 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 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".