title: Pneumoarthropathy: an unusual radiographic sign of gram-negative septic arthritis.
abstract: Gas in the joint and periarticular tissues appeared as an early radiographic manifestation of gram-negative septic arthritis of the hip in a diabetic patient.  The features of gram-negative septic arthritis are discussed and the value of an early diagnosis is emphasized.
mesh_terms: D001170:Arthritis, Infectious / Q000150:complications / Q000000981:diagnostic imaging*; D048909:Diabetes Complications; D004927:Escherichia coli Infections / Q000150:complications / Q000000981:diagnostic imaging*; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006801:Humans; D008875:Middle Aged; D011859:Radiography