Background: The role of imaging is to outline all hidden tracts and define the relationship of the fistula to the perineum. Damage to the anal sphincter can result into anal incontinence there are, however, other indications for imaging in anal fistula. Suspected fistulas and sinuses can only be visualized by the help of imaging Fluoroscopy and MRI which is use for the diagnosis of these fistulas and sinuses.
Aim and objective: To find out the diagnostic accuracy of MRI using STIR sequence compared to Fluoroscopy and to identify the modality of choice in diagnosis of fistula or sinus present in the perineum.
Materials and methods:
Study design: comparative cross-sectional study
Study setting: Lady Reading Hospital, Peshawar
Study Duration: December 2017 to May 2018
Sample size: 44 numbers
Results: total number of the patients in the study was 44.94(41/44) men were noted more affected than female in number, as 3(6%) out of 44 patients were female while all other patients were male. Mean age was 32 years. Overall sensitivity of STIR based MRI was 90 % and the specificity was 88% compared to fluoroscopy which was 58% and 38% consecutively. On the other hand, 38 patients (86%) were detected and diagnosed on MRI STIR imaging for position of the mucosal opening using anal clock.
Conclusion: Overall sensitivity and the specificity were seen higher in the MRI STIR imaging compared to fluoroscopy. Men are more affected compared than female. Such cases can be seen more in male adults of the age of 32 years.
It is better to perform MRI in the perineal fistulas and sinuses for the detection and accurately diagnosing the disease.
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