Review Question - QID 108481

A 61-year-old male presents to his primary care doctor with a six-month history of progressively worsening cough, shortness of breath, and 15-pound weight loss. Over the same time period, he has also started to notice occasional weakness in his legs that has made it difficult for him to stand up from his chair and climb stairs. The weakness appears to improve when he exercises at his local aerobics class. His past medical history is notable for hypertension and hyperlipidemia. He has smoked 2 packs of cigarettes per day for 35 years. Chest radiographs demonstrate a perihilar mass in his right lung. A biopsy of the lung lesion is shown. Which of the following is most likely true about this patient?