踝关节泪滴征(Teardrop Sign):踝关节积在侧位平片上的x线征象,正常踝关节关节囊前壁和后壁表现出脂肪样密度,当踝关节积液时,关节囊肿胀,并表现出液体样密度,呈泪滴样改变。
Causes
trauma 外伤 gout 痛风 rheumatoid arthritis 类风湿关节炎 synovitis 滑膜炎 infectious arthritis 感染性关节炎
Carke et al (2) reported that 'An ankle effusion of 13 mm (d1 + d2) or greater in total capsular distension has a positive predictive value of 82% for occult fracture and is a reasonable threshold to prompt additional imaging.'
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