AOBPr Proctology Practice Questions - AOBPr Proctology Certifying Examination Exam

Per Goodsall rule, a perianal fistula with its external opening posterior to the transverse anal line tracks:

Radially straight to the internal opening at the closest crypt Curvilinearly to the posterior midline internal crypt Up the anal canal to the dentate line at random position Always anteriorly

Correct Answer:

Curvilinearly to the posterior midline internal crypt

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