POCUS Diagnosis of Bacterial Lymphadenitis Later Determined to be Cat Scratch Disease: A Unique Presentation and Review
Bibliographic record
Abstract
Acute lymphadenopathy has a wide range of possible etiologies, ranging from self-limiting viral infections to life-threatening malignancy. Point of care ultrasound (POCUS) can play a crucial role in identifying lymphadenopathy and ruling out other potential causes of soft tissue swelling, such as hernias, abscesses, and malignancies. Furthermore, POCUS enables the characterization of lymphadenopathy by evaluating the size, shape, echogenicity, and vascularity of the involved lymph nodes, thereby helping to identify the presence and extent of pathology. When performed at the time of initial presentation, POCUS can narrow the differential diagnosis and guide appropriate work-up and management. We present a case of a teenage male evaluated in the pediatric emergency department for acute bilateral inguinal swelling, in which POCUS identified lymphadenopathy and guided the evaluation of a presumed infectious process, ultimately determined to be caused by cat scratch disease.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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 teacher head, 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".