Egyptian Journal of Radiology and Nuclear Medicine

Table 7 Comparison of fistulas tract according to parks classification, standard practice task force (SPTF) and St’s James hospital grading MRI classification

From: Direct hydrogen peroxide MRI fistulography versus indirect (intravenous) MRI fistulography in patients with perianal fistula

	Surgery		Direct fistulography		Indirect fistulography
	No	%	No	%	No	%
Parks classification
Inter-sphincteric	18	48.6	21	56.8	21	56.8
Trans-sphincteric	14	37.8	13	35.1	13	35.1
Supra-sphincter	2	5.4	1	2.7	2	5.4
Sinus	3	8.1	2	5.4	1	2.7
SPTF classification
Simple	14	37.8	17	45.9	17	45.9
Complex	20	54.1	18	48.6	19	51.4
Sinus	3	8.1	2	5.4	1	2.7
St’s James classification
I	10	27	12	32.4	12	32.4
II	8	21.6	8	21.6	9	24.3
III	8	21.6	8	21.6	6	16.2
IV	6	16.2	5	13.5	7	18.9
V	2	5.4	2	5.4	2	5.4
Sinus	3	8.1	2	5.4	1	2.7

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