title: Spontaneous external rupture of an infected popliteal cyst in rheumatoid arthritis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications*; D004926:Escherichia coli / Q000302:isolation & purification; D005260:Female; D006801:Humans; D007719:Knee Joint; D008875:Middle Aged; D012422:Rupture, Spontaneous; D013492:Suppuration; D013581:Synovial Cyst / Q000150:complications* / Q000382:microbiology