Working through the differential

I am a [clinical role, e.g., emergency physician, hospitalist, urgent care PA] evaluating a [age]-year-old [gender] with [chief complaint] and [key symptoms or exam findings] in the [care setting]. Generate a prioritized differential diagnosis for this presentation. For each diagnosis, explain what features of the history, exam, or initial tests would support or argue against it. Then explain how to distinguish [primary suspected condition] from [alternative diagnosis #1], [alternative diagnosis #2], and [alternative diagnosis #3] using bedside evaluation, labs, and imaging.