🤒 Viral Exanthem General Classification Simulator

Rash Morphology as the First Branch Point

Placeholder: morphology is the first decision node in the classification tree.

• Morphology: Branch type (Placeholder short caption)
• 3: Options (Macular, vesicular, petechial)
• Petechial: Urgency flag (Placeholder short caption)
• Timing: Next branch (Placeholder short caption)

Why morphology comes first

Placeholder: visible lesion type narrows the differential fastest.

Placeholder highlight: petechial morphology always triggers urgent pathway.

Fever-Rash Timing as the Second Branch

Placeholder: relative timing of fever and rash refines the category.

• Timing: Branch type (Placeholder short caption)
• 3: Options (Before, with, after fever)
• Roseola: Classic example (Placeholder short caption)
• Distribution: Next branch (Placeholder short caption)

Why timing matters

Placeholder: fever-rash sequence separates several classic exanthems.

Placeholder highlight: rash after defervescence suggests roseola pattern.

Distribution Pattern as the Third Branch

Placeholder: spread pattern (centrifugal vs centripetal) adds specificity.

• Distribution: Branch type (Placeholder short caption)
• 3: Options (Centrifugal, centripetal, generalized)
• Erythema infectiosum: Classic example (Placeholder caption)
• Symptoms: Next branch (Placeholder short caption)

Why distribution helps

Placeholder: spread direction narrows overlapping morphology groups.

Placeholder highlight: centrifugal spread favors certain viral groups.

Associated Clinical Findings Refine the Branch

Placeholder: lymphadenopathy, enanthem, and toxicity refine further.

• Symptoms: Branch type (Placeholder short caption)
• 3: Options (Nodes, enanthem, toxicity)
• Toxicity: Red flag (Placeholder short caption)
• Outcome: Next branch (Placeholder short caption)

Why associated findings matter

Placeholder: extra clinical clues resolve remaining ambiguity.

Placeholder highlight: systemic toxicity always escalates urgency.

General Classification Framework — Converged Outcome

Placeholder: all branches converge into one general framework outcome.

• 3: Outcome groups (Classic, vesicular, petechial-urgent)
• 4: Branches used (Morphology, timing, distribution, symptoms)
• Triage aid: Purpose (Placeholder short caption)
• Pediatric: Scope (Placeholder short caption)

Reading the converged classification

Placeholder: combine all four branch answers into one category.

Placeholder highlight: this framework is a teaching aid, not a diagnosis.