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| AuthorDavid G Weismiller, MD, ScM | Section EditorsCharles J Lockwood, MDLaurence Baskin, MD | Deputy EditorVanessa A Barss, MD |
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Circumcision (Latin circumcido, to cut around) is an elective surgical procedure in which the skin covering the end of the penis (prepuce or foreskin) is removed. The three major methods of neonatal circumcision are the GOMCO clamp, Hollister Plastibell, and Mogen clamp. These procedures will be reviewed here. A detailed discussion of the risks and benefits of neonatal circumcision can be found separately. (See "Circumcision: Risks and benefits".)
The penis consists of a root and a body (picture 1). The dorsum of the penis is the surface which faces posterosuperiorly when the penis is erect and anteriorly when the penis is flaccid. The other surface is referred to as the ventral surface (urethral surface). The penis expands distally to form the conical glans penis, whose prominent margin is called the corona of the glans.
The prepuce (foreskin) is formed by a free fold or double layer of skin and fascia that covers the glans penis for a variable extent. Its purpose is assumed to be protection of the glans. A median fold, called the frenulum of the prepuce, passes from the deep layer of the prepuce to a point just inferior to the external urethral orifice. The surface of the foreskin adjacent to the glans is not keratinized.
At birth, the foreskin is firmly attached to the glans because separation of the epithelial layers is not complete. The prepuce is usually sufficiently elastic to permit it to be retracted over the glans penis; however, retracting the foreskin while it is still attached to the glans is painful and could cause injury. The foreskin separates from the glans over time to form the preputial space. Separation has been completed in 50 percent of boys by age three years, and in 95 percent by age five. In a small number of uncircumcised males, partial adhesions leading to accumulation of smegma may persist throughout childhood, and even into adolescence.
The procedure is performed on healthy term infants who are at least 24 hours old, and preferably less than 10 days of age. This period of observation allows for recognition of abnormalities or illnesses that should be addressed before circumcision (discussed below). Preterm infants are circumcised near the time of hospital discharge.
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