Refractory and lethal status epilepticus in a patient with ring chromosome 20 syndrome
Bibliographic record
Abstract
PURPOSE: The only consistent symptom of ring chromosome 20 syndrome (r(20)) is severe, refractory epilepsy often associated with a characteristic, although not pathognomonic, EEG pattern. Patients suffer from severe seizures with accompanying cognitive decline and frequent episodes of non-convulsive status epilepticus (SE). Other features of this rare disorder, such as dysmorphic changes, mental retardation and behavioral disturbances are variable. Because of the variability of the clinical presentation, some patients with r(20) undergo invasive investigations before being diagnosed. CASE STUDY: We present the case of a young boy with no dysmorphic traits, who was only diagnosed with r (20) syndrome at the age of 13. His first seizure occurred at the age of four. Later seizures were of various types including non-convulsive SE, with deterioration of the background EEG and severe cognitive decline. Despite multiple trials of anti-epileptic medications, his seizures remained highly refractory, and he died as the result of an uncontrollable, prolonged SE, shortly after the diagnosis was made. DISCUSSION: Non-convulsive SE is common in patients with r(20) syndrome and may be caused by a dysfunction in dopaminergic neurotransmission. However, until now, no case of lethal status epilepticus has been reported. This case report suggests that patients with unexplained refractory seizures and episodes of non-convulsive SE should undergo genetic testing early in their disease, even in the absence of any morphologic features or dysmorphic traits suggestive of a chromosomal disease.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| 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; a candidate call from one source (direct Gemma or distilled Codex), 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".