患者,男,5岁。患儿于1992年3月出现右下肢。疼痛,跛行,3个月后,右膝关节肿胀,在上级基院 X线摄片,诊断为关节炎。给以抗感染、镇痛等药在家治疗,效果不佳,疼痛不见减轻。入院前1个月余出现双膝关节肿胀,疼痛,伴有发热,体温在38℃左 Patient, male, 5 years old. The right lower limb appeared in March 1992. Pain, lameness, 3 months later, the right knee joint swelling, in the superior hospital X-ray, diagnosed with arthritis. Given anti-infection, analgesic and other medicines at home, the effect is not good, and the pain is not reduced. More than 1 month before admission, there was swelling, pain, and fever in both knees. Body temperature was left at 38°C.