Medical image of the month: mucinous adenocarcinoma of the lung mimicking pneumonia

No abstract available. Article truncated after 150 words. Clinical Scenario: A 60-year-old man with a history of chronic obstructive pulmonary disease presented to the hospital with worsening shortness of breath over a period of 3 days. He had a 50-pack-year history of smoking, coronary artery disease, and a previous history of a left lung mass of unknown pathology status post left upper lobectomy. He was bought to the emergency room via ambulance after being found at home with oxygen saturations in the 60s. Upon arrival to the emergency room, he required continuous oxygen at 15 L/min to maintain his oxygen saturations above 88%. He had a progressive, markedly productive cough over the last few weeks prior to presentation. He had been treated for pneumonia with multiple courses of antibiotics over the last two months without any significant improvement. His blood work was significant for a leukocytosis with neutrophilia and an elevated D-dimer. He underwent a CTA of the …