PMC10014288_01
T2 weighted MRI image of the perineum area: Shows hyperintense lesion (arrowhead) on the left side of anal canal, suggestive of left-sided perianal fistula.
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Magnetic Resonance Imaging (MRI) of the pelvis was done, which showed an underlying perianal collection of 0.4 x 0.8 x 1.8 cm; that developed left-sided perianal fistula with cutaneous communication (with the lower third of the anal canal at 4:00 o'clock), traversing the external anal sphincter (Fig. 1).