Problem: A 69-year-old welder presents to your clinic, complaining of almost a year of chronic cough and occasional shortness of breath. Although he has had worsening of symptoms occasionally with a cold, his symptoms have stayed about the same. The cough has occasional mucous drainage but never any blood. He denies any chest pain, He has had no weight gain, weight loss, fever, or night sweats. His past medical history is significant for high blood pressure and arthritis. He has smoked two packs a day for the past 45 years. He drinks occasionally but denies any illegal drug use, He denies any foreign travel. On examination you see a man looking slightly older than his stated age. His blood pressure is 126/76 and his pulse is 92. He is slightly short of breath with respirations of 12. His head, eyes, ears, nose, and throat examinations are unremarkable, His cardiac examination is normal, On examination of his chest, the diameter seems enlarged. Breath sounds are decreased throughout all lobes, Inspiratory and expiratory wheezes are heard over all lung fields, There is no area of duliness and no increased or decreased fromitus, What thorax or lung disorder is most likely causing his symptoms? Need Assignment Help?