In which procedure is the uterus incised?

The procedure in which the uterus is incised is the cesarean section. This surgical method involves making an incision in the abdominal wall and the uterus to deliver a baby when a vaginal delivery would pose a risk to the mother or child. The incision allows for access to the uterus and subsequently to the baby, which can then be safely delivered. This approach is sometimes chosen due to concerns such as prolonged labor, fetal distress, or complications with the placenta.

In contrast, the other procedures listed involve different surgical actions on different organs. A colectomy pertains to the removal of a portion of the colon, a craniectomy involves the surgical removal of a portion of the skull, and a cholecystectomy is the removal of the gallbladder. None of these procedures involve incising the uterus, making cesarean section the only correct answer in this context.