Objective:

To study the value of conventional ultrasound and ultrasonic elastography in the diagnosis of anal fistula and perianal abscess.

Methods:

From Apr. 2014 to Apr. 2016

80 cases with anal fistula and perianal abscess in Kongjiang Hospital of Yangpu District

Shanghai

were selected. All patients were examined by conventional ultrasound and ultrasonic elastography before operation

and the results were compared with the surgical results. Th

e value of ultrasonic elastography and conventional ultrasound in the display of internal orifice

main branch

branch pipe

pus cavity was observed.

Results:

Both conventional ultrasound and ultrasonic elastography could clearly display the main fistula

with the accuracy of 100%. Ultrasonic elastography had higher accuracy (76 cases

95.0%) in the display of internal orifice than conventional ultrasound (68 cases

85.0%) (

P

0.05). Ultrasonic elastography had higher accuracy (77 cases

96.3%) in the display of branch pipe and pus cavity than conventional ultrasound (69 cases

86.3%) (

P

0.05). Ultrasonic elastography had higher accuracy (75 cases

93.8%) in the display of anal fistula than conventional ultrasound (67 cases

83.8%) (

P

0.05). The sensitivity

specificity

positive predictive value and negative predictive value of ultrasonic elastography were better than those of conventional ultrasonography (

P

0.05).

Conclusion:

Both conventional ultrasonography and ultrasonic elastography are effective methods for preoperative examination of anal fistula and perianal abscess

and ultrasonic elastography has higher accuracy.