When a child refuses to walk
Bibliographic record
Abstract
Medulloblastoma (MB), the most prevalent malignant pediatric brain tumor, is a central nervous system (CNS) that typically arises from posterior fossa.1,2 Clinical features, which usually develop over weeks to months, result from intracranial hypertension and cerebellar disfunction.2,3 One-third of pediatric patients present symptoms before 3-years-old.4 We report the challenging case of a 2-year-old female with a fulminant clinical presentation initially misinterpreted as Urinary Tract Infection (UTI).The patient, with inconspicuous family or personal health history, presented a 3-day clinical picture of persistent irritability, vomiting, anorexia and intermittent refusal to walk, without fever or other manifestations.The physical examination was unremarkable.Due to leukocyturia, urine culture was collected.Symptoms' persistence 2 days later determined her readmission.She was prostrated on her mother's lap, with no other significant findings.Gait was not evaluated.Analytically, complete blood count, inflammatory and renal function parameters were intact.Given the isolation of Escherichia coli colonies in urine and maintained oral intolerance, the toddler was hospitalized assuming a UTI and started IV antibiotic.On the second day of hospitalization, the symptoms deteriorated, with onset of ataxia, axial tremor, nystagmus and complete refusal to walk.A head-CT scan exposed an expansive lesion coincident with an embryonal tumor with IV ventricular obliteration and hydrocephalus.These findings were later confirmed by an MRI scan, which revealed intracranial and medullar leptomeningeal dissemination.The child underwent a complete lesion excision, with histological confirmation of an anaplastic medulloblastoma.On the 20th day of hospitalization, the child was transferred to Oncology Department for ongoing care and investigation, under acetazolamide
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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 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.011 | 0.003 |
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".