A hollow,fibrous tract leading from the anal canal to an opening in the perianal skin is called a(n)

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Fistulas are usually the result of incomplete healing of drained anorectal abscesses; however,they can occur in the absence of abscess history.If this is the case,other causes for the fistula must be explored.Additional predisposing factors are inflammatory bowel disease,infectious disease,malignancy,Crohn's disease,radiation therapy,chemotherapy,chlamydial infections,and trauma.Scabies cause a pruritic papular rash usually on the webs of fingers,the flexor surfaces of wrists,and the thighs.Anal fissures are described as linear tears in the epidermis of the anal canal.Pilonidal sinuses appear midline over the sacral region.

A Hollow,fibrous Tract Leading from the Anal Canal to an Opening