title: The fabella sign and radiologic assessment of knee joint effusion.
mesh_terms: D002358:Cartilage, Articular / Q000000981:diagnostic imaging*; D005122:Exudates and Transudates; D006801:Humans; D007592:Joint Diseases / Q000000981:diagnostic imaging*; D007719:Knee Joint / Q000000981:diagnostic imaging*; D011859:Radiography