Ultrasonographic Features Of Pachydermodactyly

Objective:To analysis the ultrasonic sign of the Pachydermodactyly(PDD).Methods:Thirty-two patients with PDD were collected.Ultrasound was used to examine the proximal interphalangeal(PIP)joints of each patient’s bilateral hands.The numbers of swollen joints,the thickness of swollen soft tissue and the distribution of blood flow in PIP were recorded.Observe the joint effusion,synovial hyperplasia,blood flow in hyperplastic synovium and the destruction of articular cartilage and bone.Seventy healthy people were taken as the control group,and the differences of parameters between the two groups were compared.Results:①There were one hundred and fifty-seven swollen PIP joints,including sixty PIP3,forty-eight PIP2,forty-three PIP4 and six PIP5.②The thickness of soft tissue around the swelling PIP joint and that of normal control group was as follows:PIP2(5.35±0.82)mm、(3.80±0.34)mm;PIP3(5.76±0.79)mm、(4.33±0.38)mm;PIP4(5.10±0.77)mm、(3.73±0.31)mm;PIP5(3.75±0.56)mm、(3.37±0.29)mm,and the difference between the two groups was statistically significant(P<0.05).③The thickness of the ulnar and radial sides of the thickened soft tissue was as follows:PIP2(5.36±0.82)mm、(5.33±0.82)mm;PIP3(5.78±0.79)mm、(5.75±0.81)mm;PIP4(5.11±0.75)mm、(5.10±0.79)mm;PIP5(3.72±0.58)mm、(3.78±0.56)mm.There was no significant difference between the radial and ulnar sides of thickened soft tissue(P>0.05).④There was no obvious blood flow signal in the thickened soft tissue of PDD patients.Conclusions:PDD was more common in PIP3,followed by PIP2,PIP 4 and PIP 5;Symmetrical thickening of the soft tissue around the affected joint and no obvious blood flow were the main ultrasonic signs.