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患者女,80岁。主因四肢多关节肿痛间断发作14年,右膝关节肿痛加重2周就诊。既往:类风湿关节炎(RA)病史。查体:右膝关节红肿、触热、压痛,浮髌试验(+)。超声检查:右膝关节髌上囊处见1.86 cm×5.86 cm低回声区,其内见成团点状高回声及条索状、团块状高回声飘动(图1左),PDI显示其内见较丰富血流信号(图1右)。超声提示:右膝关节大量积液,有中度较新鲜滑膜增生;右膝髌上囊低回声区内所见成团点状高回声不除外感染性关节炎。关节腔液细菌培养显示金黄色葡萄球菌生长。讨论感染性关节炎多见单关节肿痛,常伴有高
Female patient, 80 years old. Mainly due to limbs, joint swelling and pain of intermittent episodes of 14 years, right knee swelling and pain increased 2 weeks treatment. Past: A history of rheumatoid arthritis (RA). Physical examination: right knee swelling, heat, tenderness, floating patella test (+). Ultrasonography: 1.86 cm × 5.86 cm hypoechoic area was found in the suprapatellar capsule of the right knee joint. The hypoechoic area of the suprapatellar plexus was observed, See more abundant blood flow signal (Figure 1 right). Ultrasound Tip: a large number of effusion of the right knee, moderate more than fresh synovial hyperplasia; right knee patellofemoral hyoid hypoechoic area seen into a group of point hyperechoic not exclude infectious arthritis. Joint cavity fluid bacterial culture showed Staphylococcus aureus growth. More common in the discussion of infectious arthritis single joint swelling and pain, often accompanied by high