Most of the independent risk factors for hepatobiliary system surgery are similar to those for other general abdominal surgical procedures. The presence of an external-internal biliary drainage catheter and direct bilirubin concentrations higher than 15 mg/dL were found to be specific risk factors for HPB surgery.

Since there is a risk for developing invasive carcinoma in the anal canal and perineum in patients with perianal Paget's disease, close follow-up is needed after R0 or R1 excision. Physicians should be aware of the risk of cancers associated with perianal Paget's disease and should rule out them during management.

Causative pathogens in FG appeared to be shifting; thus, empirical antibiotic treatment for this disease should be modified. We recommend 3rd-generation cephalosporin, metronidazole and amikacin for empirical therapy.

Robotic surgery is an emerging field in colorectal surgery and may overcome the limitations of conventional laparoscopic surgery, such as rigid instrumentation, poor ergonomics, and assistant-dependent camera movements and retraction. In addition, robotic-assisted colectomy appears to offer comparable outcomes to laparoscopic colectomy with limited long-term outcomes data. Prolonged operating time, increased costs and learning curve are the major drawbacks of robotic colectomy for colon cancer. Although new robotic platforms promise improved ingenuity through developing technology, the role of the robot in colon cancer surgery is still unclear.

Preperitoneal catheter analgesia significantly decreased the need for epidural drug consumption and proved to be a beneficial adjunct for postoperative pain management of patients who underwent colon and rectal resections.