To treat anorectal abscesses, some guidelines must be followed. Spontaneous healing and complete resolution of perianal cellulitis is very rare and should not be expected. Broad-spectrum antibiotics without drainage delay the need for surgery and create more complex lesions. Microbiological investigations may be useful for obtaining evidence of some specific infection or of an anal venereal disease. Incision should not be delayed and should allow optimal drainage without pocketing. A lay-open or one-stage operation should not be performed in cases of Crohn's disease.
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