Subacute polyarticular arthralgias • swelling of the ankles and right

  

Subacute polyarticular arthralgias • swelling of the ankles and right knee • recent travel to the Dominican Republic • Dx? 

A 78-year-old woman with a history of anxiety and hypertension presented to our family medicine residency practice in Massachusetts with subacute polyarticular arthralgias that had been present for 2 months. She complained of pain and swelling of both ankles and the right knee. She noted that her symptoms had started on a recent trip to the Dominican Republic, where she developed generalized joint pain and a fever that lasted 1 to 2 weeks and subsequently resolved with the lingering polyarthralgia. She denied any rash,

constitutional symptoms, photosensitivity, headaches, photophobia, or history of tick bite. Physical examination revealed normal vital signs, notable warmth and swelling of the bilateral ankles that was worse on the right side, and swelling of the right knee with effusion—but no tenderness—to palpation.

1- definition

2- Possible Diagnosis with rationale explanation.
3-At least 3 differentials must be mentioned with rationales explanation. 

at least 3 references with no less then 5 years

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