Peace Sign in Calcified Idiopathic Hypertrophic Pachymeningitis
Bibliographic record
Abstract
The peace sign (Figure 1a) was originally designed in 1958 by Gerald Holtom for the British nuclear disarmament movement. It derived from the semaphore alphabet “N” and “D” representing ‘nuclear’ and ‘disarmament’. We recently cared for an 81-year-old woman with isolated complex-partial seizures who responded well to a medical treatment with carbamazepine. Coronar cranial computed tomography (CCT) (Figure 1b) showed a marked calcification of the tentorium, the posterior supratentorial falx, and the cerebellar falx mimicking a peace sign. Magnet resonance tomography (MRT) showed on a fluid attenuation inversion recovery (FLAIR) sequence (Figure 1c) a diminished signal consistent with calcification. An MRT five years earlier showed marked contrast enhancement of the tentorium and falx and adjacent dura (Figure 1d) on a T1- weighted image. The large sinus had been open. At this time diagnosis of probable idiopathic hypertrophic pachymeningitis was made as the realized evaluation failed to reveal a cause. A lumbar puncture, however, was not performed. As her clinical signs and symptoms resolved spontaneously no specific therapy was initiated. It is suggested that during time the inflammed dura healed by calcification.
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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 | 0.004 | 0.003 |
| 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 | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| 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; 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".