Evaluation of Intra- and Peri-operative Complications and Disease-free Survival in Rectal Cancer Patients Undergoing Oncological Resective Surgery and Concomitant Bariatric Surgery

Epidemiological data show that obesity is associated with a 30-70% increase in the risk of developing rectal cancer; Obesity could also be associated with a worsening of the tumor prognosis, with an increased risk of recurrence and increased mortality. From this point of view, recent studies have shown that a BMI ≥ 30 kg/m2 is associated with higher oncological and functional risks in patients with locally advanced rectal cancer, with lower response rates to neoadjuvant treatment and a less frequent preservation of the anal sphincter.

Obesity also worsens treatment outcomes: the local resective approach could in fact be more difficult in obese patients due to limited surgical visibility and it has also been reported that high visceral adiposity determines an increased risk of recurrence after chemoradiotherapy neoadjuvant. Bariatric surgery has proved to be the best choice for the treatment of morbid obesity and related comorbidities and in this context, the intragastric balloon (IGB) represents a strategy characterized by a low rate of complications and good results in terms of weight loss.

The most recent studies on the subject have shown that IGBs are effective in producing weight loss ranging from 6% to 15% compared to 1% -5% produced by lifestyle interventions alone Therefore, the need to be able to offer obese patients suffering from rectal cancer the possibility of a better recovery perspective (reduction of intra- and peri-operative complications, increased disease-free survival and lower risk of long-term recurrence) is underlined. ), alongside radical oncological surgery and neoadjuvant treatments, also a bariatric surgery such as the positioning of an intragastric balloon.