Table 1.

Evaluation of primary fistulas, internal and external openings of perianal fistulas

	N (%)
Patients with primary fistula	115
With single primary fistula	73 (63.5%)
With multiple primary fistulas	42 (36.5%)
2 primary fistulas	34 (29.5%)
3 primary fistulas	6 (5.2%)
4 primary fistulas	1 (0.9%)
6 primary fistulas	1 (0.9%)
Internal opening	198
Form of internal openings
independent internal openings	29 (14.6%)
dependent internal openings	169 (85.4%)
Site of internal openings
1-3 o’clock	44 (22.2%)
4-6 o’clock	70 (35.4%)
7-9 o’clock	49 (24.7%)
10-12 o’clock	35 (17.7%)
Patients with external opening	93
With single external opening	69 (74.2%)
With multiple external openings	24 (25.8%)
2 external openings	16 (66.6%)
3 external openings	6 (25.0%)
4 external openings	1 (4.2%)
6 external openings	1 (4.2%)
External opening	129
Cutaneous distribution of external opening
left buttock	41 (31.8%)
right buttock	40 (31.0%)
middle line of buttocks	21 (16.3%)
left perineum	10 (7.7%)
right perineum	13 (10.1%)
middle line of perineum	3 (2.3%)
middle-lower segment of the vagina	1 (0.8%)