Short-Term Postoperative Outcomes Comparable Between IRA and IPAA in FAP, Cleveland Clinic Study Finds
核心洞察
A Cleveland Clinic study of 217 FAP patients found no significant difference in 30-day or 90-day complication rates between total colectomy with IRA and proctocolectomy with IPAA.
Postoperative ileus was the most common complication in both groups (34.2% IRA vs 21.2% IPAA), while anastomotic leak was the most common severe complication (4.8% vs 7.0%).
IPAA patients were more likely to be readmitted within 30 and 90 days, most commonly due to small bowel obstruction, and had longer operative times and higher blood loss.
A new study from Cleveland Clinic, published in Diseases of the Colon & Rectum, provides the first comprehensive comparison of short-term postoperative outcomes between total abdominal colectomy with ileorectal anastomosis (TAC/IRA) and total proctocolectomy with ileal pouch-anal anastomosis (TPC/IPAA) in the era of minimally invasive surgery (MIS) for patients with familial adenomatous polyposis (搜索) (FAP).
The retrospective analysis of 217 patients—146 (67.3%) who underwent IRA and 71 (31.7%) who underwent IPAA—found no significant difference in overall complication rates between the two surgical approaches at either 30 days (P = 0.66) or 90 days (P = 0.31) postoperatively.
"Although it's clear with many patients with FAP that a proctectomy is necessary due to disease severity, many others fall into a gray area where there may be debate over whether this treatment is needed," said Josh Sommovilla, MD, a colon and rectal surgeon at Cleveland Clinic and senior author of the study. "A better understanding of the short-term risk of these surgeries could give us better insight and help clinicians' decision-making in certain situations."
Study Population and Surgical Approach
The median age at index surgery was 23 years, with the TAC/IRA group being older (26 years) than the TPC/IPAA group (20 years). Most patients with an attenuated phenotype underwent TAC/IRA compared to TPC/IPAA (13.7% vs 2.8%, P = 0.01), and the TPC/IPAA group had significantly more patients with 20 or more rectal polyps preoperatively (77.4% vs 24.6%, P < 0.01). Patients who underwent TAC/IRA were also less likely to be current or former smokers compared to those who underwent TPC/IPAA (16.4% vs 31%, P = 0.02).
Minimally invasive surgical approaches were used in 85.3% of cases, while 14.7% underwent open surgery. Among IPAA patients, 87.3% had a diverting ileostomy performed.
Complication Profiles and Hospital Stay
The most common complication within 90 days was postoperative ileus, occurring in 34.2% of TAC/IRA patients compared to 21.2% of TPC/IPAA patients, though this difference did not reach statistical significance (P = 0.06). The most common severe complication was anastomotic leak (4.8% in IRA vs 7.0% in IPAA).
Median hospital length of stay was comparable at five days for TAC/IRA and six days for TPC/IPAA. However, IPAA procedures were associated with significantly longer operative times, higher estimated blood loss, and increased rates of unplanned readmissions and reoperations.
Two mortalities (1.4%) occurred in the TAC/IRA group: one patient died of cardiac arrest within 30 days of surgery from an unknown cause, and another died of sepsis related to pneumonia within 90 days. No mortalities occurred in the TPC/IPAA group.
"Patients were more likely to be readmitted within 30 days and 90 days following the procedure," Dr. Sommovilla noted. "The most common reason for readmission in this group was small bowel obstruction, which was also the most common reason for reoperation."
Predictors of Complications
Multivariate analysis revealed that patients who underwent laparotomy had significantly increased odds of developing a 90-day complication (OR 6.8; 95% CI, 0.7–3.5). Interestingly, patients with a smoking history had marginally decreased odds of developing a 90-day complication (OR 0.4; 95% CI, −1.8 to −0.1).
Clinical Decision-Making in FAP
FAP, caused by pathogenic mutations in the APC gene, carries a nearly 100% lifetime risk of colorectal cancer if left untreated, making prophylactic surgery essential. The decision between IRA and IPAA involves balancing cancer risk reduction with quality-of-life considerations, including bowel function and continence.
"At the end of the day, there is a lot to consider when having shared-decision-making conversations with patients with FAP," said Dr. Sommovilla. "These conversations really need to be tailored to every patient, and all of the important factors, including cancer risk reduction, functional outcomes, colorectal polyp burden, genotype, desmoid disease, age and postoperative complications, need to be considered."
Dr. Sommovilla emphasized that both surgical approaches carry individual risks and benefits that must be weighed during the decision-making process. Related research on the progression of rectal polyposis following ileorectal anastomosis in FAP is scheduled for presentation at this year's American Society of Colon and Rectal Surgeons (ASCRS) Annual Meeting in Washington, D.C.