title: Lipoma arborescens as an unusual cause of recurrent effusion in knee osteoarthritis: sonographic and arthroscopic appearance.
authors.forename: Angel
authors.initials: A
authors.lastname: Checa
authors.forename: Carolyn Riester
authors.initials: CR
authors.lastname: O'Connor
mesh_terms: D000368:Aged; D001182:Arthroscopy; D005260:Female; D006801:Humans; D007719:Knee Joint; D008067:Lipoma / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology*; D020370:Osteoarthritis, Knee / Q000150:complications* / Q000000981:diagnostic imaging; D013583:Synovial Membrane / Q000473:pathology*; D014463:Ultrasonography