Fissure of the Anus and Fistula in AnoNote 6 — Chapter I · DEFINITION—LOCATION—AGE AND SEX AFFECTED—ETIOLOGY.Reading editionBall, "The Rectum and Anus," Philadelphia, 1887, pp. 128-129.◇Copy noteReturn to CHAPTER I. DEFINITION—LOCATION—AGE AND SEX AFFECTED—ETIOLOGY.