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Table 3 Frequency of ultrasound signs in patients according to the joints examined

From: A prospective evaluation of ultrasound as a diagnostic tool in acute microcrystalline arthritis

  Joint localisation of ultrasound signs (number/joint)a
  Knee MTP Wrist Ankle Hand Others
Gout confirmed (60 patients)       
Symptomatic joints       
 MSU signs 10 38 0 9 1 0
 CPP signs 13 2 0 1 1 0
Asymptomatic jointsb       
 MSU signs 10 32   9   
 CPP signs 12 5   3   
CPP confirmed (37 patients)       
Symptomatic joints       
 CPP signs 22 1 4 1 1 0
 MSU signs 0 5   3   
Asymptomatic joints       
 CPP signs 15 7   1   
 MSU signs 0 7   3   
No crystals (21 patients)       
Symptomatic joints       
 MSU sign 0 2 0 0 0 0
 CPP sign 3 1 2 0 0 0
Asymptomatic joints       
 MSU signs 0 3   0   0
 CPP signs 5 3   1   0
  1. CPP calcium pyrophosphate, MSU monosodium urate, MTP metatarsophalangeal joint
  2. aFor some patients several joints were symptomatic, so the number of joints is larger than the number of patients
  3. bFor some patients signs were present on symptomatic and asymptomatic joints, so the number of joints is larger than the number of patients