Case 1: "A 23-year-old male presents with ataxia for 10 days"
Case 2: "A 67-year-old male presents with right wrist mass for 1 year"
Case 3: "A 32-year-old male presents with acute abdominal pain for 6 hours"
Case 4: "A 64-year-old female presents with right knee pain for 3 months "
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