The incision for colon resection surgery, or colectomy, is made in the patient's lower abdomen, according to MedlinePlus. The size and number of incisions depends on whether the surgery is performed laparoscopically or is an open surgery.
The size of the incision also depends on whether the surgeon needs to manually locate the diseased area, says MedlinePlus.
In an open colectomy, the surgeon makes an incision that's about 6 to 8 inches long in the patient's lower abdomen, claims MedlinePlus. In a laparoscopic colectomy, the surgeon makes three to five incisions in the lower abdomen. He uses these incisions to insert a tiny camera and miniaturized instruments to perform the operation.