Brain Metastasis from Prostate Small Cell Carcinoma: Not to be Neglected
Bibliographic record
Abstract
BACKGROUND: Symptomatic brain metastases from prostatic carcinoma are rare (0.05% to 0.5%). CASE REPORT: A 70-year-old man presented with a homonymous hemianopsia due to brain metastatic prostatic carcinoma shortly before becoming symptomatic of prostatic disease. CT and MRI of the brain showed a tumour deep in the right hemisphere near the thalamus and involving the optic radiation. RESULTS: Routine haematological and biochemical tests were normal. The prostate specific antigen level was low on two separate occasions. The prostatic and brain tumours showed identical appearances, namely of a poorly differentiated adenocarcinoma with neuroendocrine differentiation (small cell carcinoma). CONCLUSION: A literature review suggests that small cell carcinoma of the prostate is more likely to spread to the brain compared to adenocarcinoma and that brain metastases indicate a poor prognosis. The prostate gland should be remembered as a possible cause of brain metastases and that a normal serum prostate specific antigen does not exclude this diagnosis.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 0.003 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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; both teacher heads agree on what is shown here.
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".