• Udit Chaddha, Rebekah English, Jessica Daniels, Rajat Walia, Atul C Mehta, and Tanmay S Panchabhai.
• Department of Pulmonary, Critical Care and Sleep Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, CA.
• Chest. 2017 Jun 1; 151 (6): e131-e134.

Case PresentaionA 58-year-old man presented with a 6-month history of profound fatigue and a weight loss of 35 to 40 pounds. He reported occasional night sweats and mildly painful knees and elbows without swelling or redness. He denied respiratory symptoms, rashes, or fevers. He had no respiratory symptoms. The patient's history was significant for rheumatoid arthritis (with arthralgias and joint involvement), paroxysmal atrial fibrillation, and hypothyroidism. His medications included digoxin and metoprolol. He had been taking methotrexate and low-dose prednisone (5 mg) for approximately 10 years but discontinued taking these medications 2 years prior to current presentation. Originally from West Virginia, the patient had relocated to Arizona during the early 1980s. There was no history of international travel or TB. He had no exposure history to birds, bird feathers, or mold; however, he did report exposure to dust at his current job as a home building superintendent. He reported a 10 pack-year history of smoking, having quit 20 years ago. His family history was significant for renal sarcoidosis in his mother.Copyright © 2016 American College of Chest Physicians. Published by Elsevier Inc. All rights reserved.

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