A 20-year-old male patien...

A 20-year-old male patient presents with a gradual onset of breathing difficulty. He reports swelling starting from the foot and extending to the upper abdomen within a span of 20 days. Upon arrival at the emergency department, he exhibits severe shortness of breath. High-resolution CT scans of the chest and abdomen reveal moderate pleural effusion and ascites. The patient has no history of hypertension, diabetes mellitus, coronary artery disease, or chronic kidney disease, and he is non-alcoholic. He denies any history of fever or tuberculosis. What are the possible differential diagnoses, and how should one proceed with evaluation?