Circumcision is the surgical procedure involving the complete removal of the foreskin, which is the retractable fold of skin covering the glans penis. This procedure does not involve the glans, penile shaft, or urethra. The key surgical point is the excision of the preputial tissue, often performed to reduce infection risk, improve hygiene, or for cultural/religious reasons. Proper technique ensures preservation of the glans and underlying structures while safely removing only the foreskin.

Reference: Campbell-Walsh Urology, 12th Edition.