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Colorectal · diverticular disease

Sigmoid resection for diverticular disease - the right operation at the right point.

Elective resection for recurrent or complicated diverticulitis, planned around Hinchey grade, fistulae and your quality of life. Semi-urgent and emergency pathways when things deteriorate - with a consultant colorectal surgeon named from the first call.

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A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Indicative pricing

What surgery for diverticular disease costs in the UK.

Indicative ranges across our vetted UK partners.

In short

£16,000–£23,000, home in 3–5 nights.

Procedure Indicative range
Elective laparoscopic sigmoidectomy (uncomplicated diverticular) £16,000–£20,000
Laparoscopic sigmoidectomy for complicated disease (fistula, stricture) £19,000–£26,000
Robotic-assisted sigmoidectomy £22,000–£32,000
Hartmann's procedure £19,000–£28,000
Hartmann's reversal £12,000–£20,000
Laparoscopic lavage (Hinchey III, selected) £10,000–£16,000
Colorectal consultation only £250–£450

Complicated (fistula, stricture, chronic phlegmon) and emergency cases sit at the top of the range. Robotic and en-bloc resections add cost.

The problem

When to operate, and when not - decided by Hinchey grade, not by anecdote.

Diverticular surgery is where general lists get it wrong most often - operating too early on mild disease, too late on complicated disease, and defaulting to Hartmann's when a keyhole join was possible.

  • Grade the disease, then decide

    Hinchey Ia settles on antibiotics. Ib–II with a big abscess often needs drainage then resection. III–IV is emergency territory. The grade drives the plan.

  • Not every recurrent flare needs surgery

    Two mild admissions do not automatically mean a colectomy. We weigh quality of life, work, fertility plans and imaging - not episode count alone.

  • Fistulae need a plan, not just a resection

    Colovesical and colovaginal fistulae need urology or gynaecology involvement, and often an en-bloc resection with primary closure of the other organ.

When it helps

When surgery is the right step for diverticular disease.

The scenarios where resection changes the outcome, plus the red flag that means emergency admission rather than an elective plan.

  • Recurrent uncomplicated diverticulitis

    Two or more admissions with real impact on life, work or family - where each flare shortens the window between them.

  • Hinchey Ib pericolic abscess

    Small abscesses may settle on antibiotics; larger ones need radiological drainage and then interval resection.

  • Hinchey II pelvic abscess

    Distant pelvic collections - nearly always need drainage plus interval sigmoidectomy.

  • Colovesical fistula

    Recurrent UTIs with air or faeces in the urine, or bubbling on voiding. En-bloc sigmoid and bladder-dome resection.

  • Colovaginal fistula

    Vaginal passage of gas or faeces, often after hysterectomy. En-bloc sigmoid resection with vaginal repair.

  • Diverticular stricture

    Chronic narrowing on colonoscopy or CT, with obstructive symptoms or where cancer cannot be excluded.

  • Chronic smouldering phlegmon

    Ongoing pain and inflammatory markers between formal flares - a quality-of-life indication in the right patient.

  • Red flag: peritonitis, sepsis or faecal peritonitis

    Rigid abdomen, low blood pressure, or free gas on CT - Hinchey III–IV - is emergency territory. A&E, not an elective clinic.

Options

Elective, semi-urgent or emergency - and by what technique.

What each option involves - from planned laparoscopic resection with primary join to Hartmann's for perforated disease and en-bloc resection for fistulae.

  • Elective laparoscopic sigmoidectomy

    The standard where inflammation has settled - clean fields, primary colorectal join, ERAS discharge 3–5 nights.

  • Robotic sigmoidectomy for complicated disease

    Useful for pelvic phlegmon, obesity, previous surgery and fistulating disease where fine dissection matters.

  • Open sigmoidectomy

    For hostile abdomens, emergencies converted from laparoscopy, and where oncological doubt persists on cross-sectional imaging.

  • Hartmann's procedure

    Resection with end colostomy - the safest operation in perforated peritonitis or a very sick patient. Reversal considered at 6+ months.

  • Laparoscopic lavage (Hinchey III, selected)

    For purulent (not faecal) peritonitis in fit patients - washout without resection. Selection is critical; not for everyone.

  • En-bloc sigmoid + bladder patch (colovesical fistula)

    Fistula tract taken en-bloc with the bladder dome, closed and catheter-drained for 10–14 days.

  • En-bloc sigmoid + vaginal repair (colovaginal fistula)

    Resection with primary vaginal repair, often with an omental flap between the anastomosis and vagina.

  • Hartmann's reversal

    Restores continuity 6–12 months after the acute event, once the patient and tissues are ready. Not always straightforward.

Safety and recovery

What to expect afterwards - honestly.

Diverticular surgery is safe when planned. What matters is choosing the right moment - after a Hinchey grade is settled, not in the middle of an acute attack.

  • Right operation at the right time

    Resecting during acute inflammation is harder and riskier. We usually settle the flare first, then operate on quiet tissues 6–8 weeks later.

  • Anastomotic leak in inflamed tissue

    Even elective diverticular resections have a slightly higher leak rate than cancer resections because of chronic inflammation - around 3–6%.

  • Stoma is not failure

    A defunctioning or end stoma in an inflamed pelvis or a sick patient is a safety choice. We discuss it before the operation, not in recovery.

  • Fistula surgery is bigger surgery

    Colovesical and colovaginal repairs add operative time, a urinary catheter for 10–14 days, and higher wound-infection risk. Worth planning fully.

  • Bleeding, infection, DVT

    Same risks as any major abdominal surgery. Prophylaxis is standard. Signs to call about: fever, spreading redness, calf pain, breathlessness.

  • Recurrent diverticulitis after resection is uncommon

    Under 10% of patients have a further attack after adequate resection - recurrence often means an incomplete resection or a separate segment.

  • No routine surveillance colonoscopy

    Unlike cancer resection, diverticular resection alone does not need long-term surveillance colonoscopy. Symptom-led investigation only.

  • Reversal of Hartmann's is not guaranteed

    Around 50–60% of Hartmann's patients get their stoma reversed. Frailty, comorbidities and pelvic scarring account for the rest.

  • Emergency ≠ private route

    Peritonitis or septic shock belongs in the nearest NHS A&E. Private transfer is often possible once stabilised, but never at the expense of safety.

Reading your notes

Your notes in four parts. Read the last one first.

The letter you receive from the consultant keeps to the same shape.

  1. 01 Grading

    Hinchey grade and CT findings

    The classification that steered the plan - from mild peridiverticulitis to faecal peritonitis - and the imaging that supported it.

  2. 02 Technique

    Approach and reconstruction

    Laparoscopic, robotic or open. Primary anastomosis, Hartmann's, or lavage. Any en-bloc resection for fistula.

  3. 03 Histology

    Confirmation and incidental findings

    Confirmation of diverticular disease and exclusion of underlying cancer. Any incidental polyps or dysplasia.

  4. 04 Impression

    Recovery, stoma plan, no routine surveillance

    Read this first: recovery milestones, stoma reversal timing, and why surveillance colonoscopy is not routinely offered for diverticular resection alone.

Recognised by major UK insurers

BupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealix

Elective and complicated diverticular disease surgery is usually covered where medically indicated. Emergency admissions default to NHS but private transfer is often possible.

Frequently asked

Everything we get asked about diverticular surgery.

Quick answers on Hinchey grade, when to operate, fistulae, Hartmann's, recurrence and cost.

  • How many episodes of diverticulitis before surgery is offered?

    There is no automatic number. We weigh episode severity (Hinchey grade), impact on your life and work, imaging findings, age, and future fertility plans. Two severe or complicated episodes usually make elective surgery a good option; two mild attacks in your 70s often do not.

  • What is the Hinchey classification?

    A grading system for acute diverticular disease. Ia is peridiverticular phlegmon; Ib is a pericolic abscess; II is a distant pelvic abscess; III is purulent peritonitis; IV is faecal peritonitis. Grade Ia usually settles on antibiotics; Ib–II need drainage then resection; III–IV need emergency surgery.

  • Will I need a stoma?

    For elective, planned diverticular resection, most patients wake up without a stoma. In complicated cases, a defunctioning loop ileostomy may protect the join for 3–6 months. In emergency perforation, a Hartmann's procedure with end colostomy is often the safest choice - reversed later where the patient is fit for it.

  • What is a colovesical fistula, and how is it fixed?

    A connection between the sigmoid and the bladder, usually caused by chronic diverticular inflammation. Classic symptoms are recurrent UTIs with air in the urine (pneumaturia). Treatment is elective sigmoid resection with en-bloc removal of the bladder patch and 10–14 days of urinary catheterisation.

  • Can I have laparoscopic lavage instead of resection?

    For carefully selected patients with purulent (not faecal) peritonitis and no other option to fix, laparoscopic lavage is sometimes offered. Trial data are mixed and it is not the default - most Hinchey III–IV cases are safer with a Hartmann's.

  • Will diverticulitis come back after surgery?

    Recurrence after an adequate sigmoid resection is under 10%. When it does happen, it is usually because the resection did not extend to the top of the rectum or because a separate colonic segment was involved. We aim to leave you with a durable operation, not another admission.

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