title: Thorn synovitis: CT diagnosis.
abstract: A case of monoarticular arthritis due to a retained thorn about the left knee is presented. In this case CT was helpful to localize precisely the thorn within the joint whereas other modalities such as plain films, gallium scan, and 99mTc-methylene diphosphonate bone scan were negative.
mesh_terms: D002675:Child, Preschool; D005547:Foreign Bodies / Q000000981:diagnostic imaging*; D006801:Humans; D007717:Knee / Q000000981:diagnostic imaging; D007718:Knee Injuries / Q000150:complications / Q000000981:diagnostic imaging; D008297:Male; D013585:Synovitis / Q000000981:diagnostic imaging* / Q000209:etiology; D014057:Tomography, X-Ray Computed; D014950:Wounds, Penetrating / Q000150:complications / Q000000981:diagnostic imaging