Case Presentation: A 67-year-old female with a 37-year history of seropositive rheumatoid arthritis (RA), managed with tocilizumab for the past two years, presented with a 3-month history of intermittent cough and blood-streaked sputum. Additional symptoms included generalized weakness, shortness of breath, intermittent low-grade fevers, chills, and night sweats. She denied unintentional weight loss, lightheadedness, dizziness, [...]