Task: Question Answering
Input (English): Question: 80-year-old woman who consults for presenting, for 1 month, progressive increase of the abdominal perimeter. During the previous 4-5 months note asthenia, anorexia and weight loss not specified. On physical examination, tension ascites and malleolar edema are seen, with no other relevant signs. Ultrasonography and CT scan of the abdomen demonstrate the presence of ascites, of homogeneous density, without appreciating peritoneal implants or abdominal or pelvic masses. Liver, pancreas, adrenal glands, spleen and kidneys without significant findings. Paracentesis is performed through a thick needle, obtaining a somewhat yellowish, dense and gelatinous fluid with difficulty. What is the most likely etiology? 
 Options:  <1> Hydropic decompensation secondary to liver cirrhosis. <2> Chylose ascites due to non-Hodgkin's lymphoma. <3> Peritoneal tuberculosis. <4> Peritoneal metastasis of adenocarcinoma. <5> Ascites secondary to constrictive pericarditis.
Output (English): 4