Case 1: “A 69-year-old man presented with persistent pleural effusion and alteration of consciousness
for 7 days”
Case 2: “A 20-year-old man presented with diarrhea for 1 month”
Case 3: “An 82-year-old man presented with alteration of consciousness for 3 days”
Case 4: “A 21-year-old female presented with progressive hoarseness of voice for 3 months”