Progressive Neurodegenerative Syndrome in a Patient with X-linked Agammaglobulinemia
Bibliographic record
Abstract
Objective N/A. Background X-linked agammaglobulinemia is a primary immunodeficiency disorder affecting B-cell maturation, causing low or undetectable levels of circulating antibodies, and predisposing patients to severe and recurring infections with encapsulated bacteria and bloodborne viruses. A rare, usually fatal, neurological complication can manifest as a neurodegenerative syndrome with progressive loss of motor and cognitive skills. Although usually attributed to Chronic Enteroviral Meningoencephalitis, cases without a clear infectious etiology have also been reported, posing a diagnostic challenge. Design/Methods N/A. Results An 18-year-old male with history of X-linked agammaglobulinemia, and previously independent of all activities of daily living, was presented for a two-year history of progressively worsening slurred speech with associated tremors, impaired coordination and gait imbalance. Neurological exam was significant for global deficits in cognitive domains as per Montreal Cognitive Assessment (13/30), dysarthric and dysfluent speech, spastic upper and lower extremities, dysdiadochokinesia, dysmetria and impaired tandem gait; cranial nerves, strength, deep tendon reflexes and sensation were intact. Brain MRI demonstrated mild diffuse parenchymal atrophy; spinal cord MRI was reported normal. Routine EEG was reported normal. Lumbar puncture had normal opening pressure; CSF analysis was unremarkable. PCR for Enterovirus in CSF was negative as well as for other viruses. Paraneoplastic, metabolic and nutritional evaluations were reported normal. Baclofen was started for his spasticity and Carbidopa-Levodopa trial was provided for patient's tremors. Patient was also started on IVIg therapy, but no significant response to any treatment modalities was achieved. Over the next 10 months, patient's tremors, gait instability and speech continued to deteriorate resulting in bedbound status. Conclusions Few case reports documenting survival highlight the importance of early diagnosis and aggressive immunotherapy. Progressive neurodegenerative syndrome in X-linked agammaglobulinemia is a challenging diagnosis burdened with diagnostic delays, uncertain etiological mechanism and no significantly effective treatment options.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.002 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".