Case 1: "A 52-year-old male presents with progressive dyspnea for 1 week"
Case 2: "A 35-year-old male presents with subacute fever for 12 days"
Case 3: "A 54-year-old male with HIV infection presents with abdominal distension for 2 months"
Case 4: "A 66-year-old female presents with headache for 1 month"
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