IPAA Staging Planner

Modified 2-stage

NOT RECOMMENDED. The ASCRS guideline lists modified 2-stage among the preferred approaches and its text is reproduced above unaltered, but this author's opinion, based on new evidence, is that it should no longer be performed, except perhaps by select high-volume, experienced pouch surgeons. The evidence now points the other way. (1) RANDOMISED: the GETAID IDEAL trial (presented at the 2025 ESCP Tripartite Meeting, Paris; full paper pending) was TERMINATED EARLY for anastomotic leak, 32% in the modified 2-stage arm vs 13% with 3-stage. (2) COHORT: a 6-centre European retrospective series (Moojen et al., BJS Open 2025; PMID 40982298) found leak in 18.4% (42/228) after modified 2-stage vs 4.9% (7/142) after 3-stage, p < 0.001–370 of its 411 patients. (3) VOLUME is the reason for the carve-out: in that same cohort leak was 28.0% (7/25) in low-volume centres (<10 pouches/year) vs 12.7% (49/386) in high-volume centres, p = 0.03. (4) ECCO UC Surgical 2026 does NOT withhold it. It calls the two-stage vs modified two-stage debate unresolved. but it conditions the option on the CENTRE being able to catch and treat a leak before pelvic sepsis sets in (quoted below), which is the same carve-out stated as a capability rather than a preference. Withholding it outright is therefore this author's editorial position, going further than either guideline; the carve-out itself is not.

“The modified 2-stage IPAA (total abdominal colectomy and end ileostomy followed by completion proctectomy and IPAA without a diverting loop ileostomy), increasingly utilized in recent years, is not associated with increased rates of anastomotic leak, pelvic sepsis, or pouch failure compared with the conventional 2-stage IPAA (total proctocolectomy with IPAA and diverting ileostomy followed by ileostomy closure), but this technique has not been directly compared with the 3-stage approach.”

The American Society of Colon and Rectal Surgeons Clinical Practice Guidelines for the Surgical Management of Ulcerative Colitis · 2021 · PMID 33853087

The cohort behind that sentence, quoted from the PRIMARY source rather than second-hand: 18.4% (42/228) vs 4.9% (7/142), p < 0.001. The 370 are the two compared arms; 411 patients were enrolled in all.

“Among patients who underwent a three-stage procedure, 4.9% (7 of 142) had a diagnosed AL, compared with 18.4% of patients (42 of 228) who underwent a modified two-stage procedure”

Anastomotic leakage after ileoanal pouch surgery: risk factors and salvage rate · 2025 · PMID 40982298

WHY THE CARVE-OUT IS VOLUME, not preference: in the same cohort leak more than doubled in centres performing fewer than ten pouches a year.

“Having pouch surgery in a low-volume centre was significantly associated with the occurrence of an AL compared with undergoing surgery in a high-volume centre (28.0% (7 of 25) versus 12.7% (49 of 386), respectively; P = 0.031)”

Anastomotic leakage after ileoanal pouch surgery: risk factors and salvage rate · 2025 · PMID 40982298

ECCO 2026 does NOT withhold modified 2-stage, it calls the debate unresolved. But its condition is precisely the carve-out above: the CENTRE must be able to catch and treat a leak fast. That is what 'select high-volume, experienced pouch surgeons' means in practice.

“The debate over whether to perform a two-stage or a modified two-stage restorative proctocolectomy in the elective setting remains unresolved, with the literature listing advantages and disadvantages for both approaches.41,42 The most important point in this context is that a center electing to offer a modified two-stage option must be able to rapidly address an anastomotic leak before pelvic sepsis becomes apparent and long-term function is affected.”

ECCO Guidelines on Therapeutics in Ulcerative Colitis: Surgical Treatment. · 2026 · PMID 42381162

Single-stage

NOT RECOMMENDED, and here the guidelines agree. ECCO UC Surgical 2026 states plainly that one-stage restorative proctocolectomy REMAINS UNADVISED (quoted below). ASCRS is not permissive, merely silent: 'single-stage' and '1-stage' appear ZERO times in PMID 33853087. Where it HAS been measured it performs worst of the four: 20.0% leak (10/50) in the Mount Sinai series (Plietz et al., Dis Colon Rectum 2021; PMID 34561342) against 3.2% for 3-stage. The authors attribute the rapid decline in its use to exactly that , and 38.5% (5/13) in the European cohort (Moojen et al., BJS Open 2025; PMID 40982298), where it was only 3.2% of 411 cases. Reserve any consideration of an undiverted pouch for select high-volume, experienced pouch surgeons. Editorial position.

'single-stage' and '1-stage' appear ZERO times in the ASCRS UC guideline (PMID 33853087). ASCRS is silent, not permissive. ECCO 2026 is not silent: it calls one-stage unadvised.

“A one-stage restorative proctocolectomy remains unadvised, whereas a three-stage restorative procedure is the conservative standard, when the patient was initially operated for ASUC, is unfit, suffers from proctitis, or combinations thereof.”

ECCO Guidelines on Therapeutics in Ulcerative Colitis: Surgical Treatment. · 2026 · PMID 42381162

The only cohort reporting all four stage counts together. Single-stage leaked at 20.0% (10/50). Over 6x the 3-stage rate of 3.2% (10/314).

“Anastomotic leak occurred in 10 patients (3.2%) after 3-stage, 14 patients (8.6%) after 2-stage, 6 patients (10.3%) after modified 2-stage, and 10 patients (20.0%) after a 1-stage procedure.”

Slow and Steady Wins the Race: A Solid Case for a 3-Stage Approach in Ulcerative Colitis · 2021 · PMID 34561342

The authors' own reading of that number, and the reason single-stage is no longer a live option in most practices.

“The 1-stage RPC had an unexpectedly high leak rate at 20%, which may explain the rapid decline in its use later in the study.”

Slow and Steady Wins the Race: A Solid Case for a 3-Stage Approach in Ulcerative Colitis · 2021 · PMID 34561342