title: Pyogenic Baker cyst in a patient with psoriatic arthritis during etanercept therapy.
abstract: Patients with psoriatic arthritis (PsA) are at increased risk of infection due to disease course or treatment-related immunodeficiency. We describe a patient with a 10-year history of PsA, with arthritis of the right knee and pain and edema in the right calf, treated with the TNFa inhibitor etanercept for 6 months. Ultrasound showed accumulation of hypoechoic fluid, which was aspirated and was positive for staphylococcus and aspergillus. The patient recovered after surgical drainage and four weeks of antibiotic and antifungal therapy.
authors.forename: Keng-Yi
authors.initials: KY
authors.lastname: Wu
authors.affiliation: Deng-Ho Yang, MD, Division of Rheumatology/Immunology/Allergy,, Taichung Armed-Forces General Hospital,, No 348, Sec. 2, Chung Shan Road,, Taiping 411, Taichung, Taiwan,, Republic of China, T: +886-4-23934192, F: +886-4-23934191, deng6263@ms71.hinet.net.
authors.forename: Deng-Ho
authors.initials: DH
authors.lastname: Yang
authors.forename: Chun-Wen
authors.initials: CW
authors.lastname: Chen
mesh_terms: D000328:Adult; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D000935:Antifungal Agents / Q000627:therapeutic use; D018501:Antirheumatic Agents / Q000009:adverse effects*; D015535:Arthritis, Psoriatic / Q000150:complications / Q000188:drug therapy*; D001228:Aspergillosis / Q000188:drug therapy / Q000209:etiology; D001230:Aspergillus; D000068800:Etanercept / Q000009:adverse effects*; D006801:Humans; D008297:Male; D011151:Popliteal Cyst / Q000139:chemically induced* / Q000188:drug therapy / Q000382:microbiology; D013203:Staphylococcal Infections / Q000188:drug therapy / Q000209:etiology; D013210:Staphylococcus; D016896:Treatment Outcome
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D018501:Antirheumatic Agents; D000068800:Etanercept