title: [Popliteal aneurysm simulating a Baker's cyst in a patient with rheumatoid arthritis: a case presentation].
abstract: Baker's cyst is the most common mass located in the back side of the knee, the popliteal fossa, in patients with degenerative and inflamatory disease of the knee. Popliteal mass may also be due to proliferation of adipose tissue, popliteal artery aneurysm, thrombotic vein, or tumor. These lesions are rarer and may easily be misinterpreted as cysts. We show a man with rheumatoid arthritis who is presenting a palpable mass in the popliteal fossa. Ultrasonography examination demostrated a popliteal artery aneurysms.
authors.affiliation: Servicio de Reumatología. Hospital Universitario Dr. Peset, Valencia, España. inchave@yahoo.es
authors.forename: Concepción
authors.initials: C
authors.lastname: Chalmeta Verdejo
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Alegre Sancho
authors.forename: José Andrés
authors.initials: JA
authors.lastname: Román Ivorra
authors.forename: José
authors.initials: J
authors.lastname: Ivorra Cortes
mesh_terms: D000783:Aneurysm / Q000150:complications / Q000000981:diagnostic imaging*; D001172:Arthritis, Rheumatoid / Q000150:complications*; D003951:Diagnostic Errors; D006801:Humans; D008297:Male; D008875:Middle Aged; D011150:Popliteal Artery / Q000000981:diagnostic imaging*; D011151:Popliteal Cyst / Q000175:diagnosis*; D018615:Ultrasonography, Doppler, Color