Psoriatic Arthritis Linked to Pembrolizumab in a Lung Cancer Patient: From Oncologist to Rheumatologist.

Immune-related rheumatic adverse effects (rheumatic IAEs) are commonly observed in patients undergoing immunotherapy for solid tumors and hematologic malignancies. The Romanian National Health Insurance House offers all patients free access to oncology medications and has significantly improved in recent years. Here, we present a case of a 69-year-old male patient diagnosed with a bronchopulmonary neoplasm who developed psoriatic arthritis (PsA) after receiving immunotherapy with pembrolizumab, emphasizing the challenges of therapeutic management in this case.