Febrile Illness in a Toddler: The Diagnostic Clue Lays Skin Deep
Bibliographic record
Abstract
A five-year-old boy ar rived in Can ada fron China.The fol low ing day he de vel oped a left cer vi cal swel ling, and was started on oral peni cil lin at a walk-in clinic.Sub se quently, he de vel oped fe ver and neck pain.Within 48 h, the left side of his neck was swol len, eryth ema tous and ex tremely pain ful.There was no his tory of cough, weight loss or night sweats.His past his tory was un re mark able, and all his im mu ni za tions were up-to-date.He had re ceived the ba cil lus Calmette-Guérin (BCG) vac cine in the new born pe riod as part of the rou tine vac ci na tion sched ule in China.He was the only child of a Chi nese cou ple who had just im mi grated to Can ada.On ex ami na tion, the boy was feb rile (38.5°C) and ap peared unhappy.His eyes showed bi lat eral con junc ti val ery thema.He had leftsided tor ti col lis.The left sub man dibu lar lymph node was tender and meas ured 3×3 cm.The over ly ing skin showed in tense ery thema.There was no other lym pha de no pa thy.The ear, nose and throat exami na tion was nor mal.The rest of the sys temic ex ami na tion was also nor mal; in par ticu lar, there was no he pa tospleno megaly.He was ad mit ted to hos pi tal and was started on par enteral an ti biot ics: clin da my cin and ce furxime.In ves ti ga tions re vealed a to tal leuko cyte count of 21.12×10 9 /L: ab so lute neu tro phils 16.5×10 9 /L, bands 1.6×10 9 /L); and lym pho cytes 1.27×10 9 /L).The plate let count was 381×10 9 /L, he mo glo bin 108 g/L and sedi men ta tion rate was 97 mm/h; an uri naly sis was nor mal.Serology for Epstein-Barr vi rus was nega tive.A Man toux test placed on ad mis sion was nega tive when read at 48 h.Ul tra sound in ves ti ga tion of the neck mass ex cluded the pos si bil ity of an ab scess.Dur ing hos pi tali za tion, he con tin ued to have a fe ver of 38.5 to 38.8°C.On the fifth day of ad mis sion, he was noted to have a rash on the flexor ar eas, around the large joints, and on his palms and soles.The site of a prior BCG vac ci na tion was raised and ery the ma tous (Fig ure 1).What is the di ag no sis?
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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 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 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".