title: Spontaneous rupture of primary musculoskeletal hydatid cyst.
mesh_terms: D004443:Echinococcosis / Q000150:complications*; D006801:Humans; D008161:Lumbosacral Region; D008875:Middle Aged; D009135:Muscular Diseases / Q000150:complications*; D012422:Rupture, Spontaneous; D013122:Spinal Diseases / Q000150:complications*