A Rare Cause of Black Pleural Effusion

A 64-year-old man was admitted to the respiratory ward with a 2-week history of progressive dyspnea. He had lost 5 kg in body weight during the previous 2 months. He had a mild dry cough, but he denied a history of fever, or night sweats. One year previously, he had undergone spleen and pancreatic tail resection in a local hospital because of abdominal trauma. He reported no history of hypertension, diabetes, or hyperlipidemia, and he had no personal or family history of cancer; however, he had a >40-year history of smoking.