Case Presentation: A 76-year-old man with seropositive RA treated with MTX 15-20mg weekly for at least four years presented to the hospital with worsening fatigue, generalized weakness, poor appetite, and dyspnea. Contrast-enhanced computed tomography of chest abdomen and pelvis (CT CAP) demonstrated numerous pulmonary nodules, centrally hypodense left retroperitoneal soft tissue masses which may represent […]