Open vs. Closed Hemorrhoidectomy: Key Differences
Both open (Milligan-Morgan) and closed (Ferguson) hemorrhoidectomy are equally effective for treating hemorrhoids, with no significant difference in postoperative pain, but closed hemorrhoidectomy offers faster wound healing and better long-term anal continence outcomes. 1, 2, 3
Technical Differences
Open Hemorrhoidectomy (Milligan-Morgan)
- Internal and external hemorrhoid components are excised in a 3-leaf clover pattern
- Wounds are left open to heal by secondary intention
- Healing time: 4-8 weeks 1
- Widely used in the United Kingdom 1
Closed Hemorrhoidectomy (Ferguson)
- Same hemorrhoid components are excised
- Wounds are closed primarily with sutures
- Faster healing: typically 2-3 weeks 4
Clinical Outcomes Comparison
Postoperative Pain
Three of four randomized trials showed no difference in postoperative pain between techniques 1. This finding has been consistently replicated in more recent studies 3, 5, 6. The 2016 meta-analysis of 1,326 patients did show a modest reduction in pain with closed technique (SMD -0.36), but this difference is clinically marginal 3.
Wound Healing
Closed hemorrhoidectomy demonstrates significantly faster healing:
- At 3 weeks: 86% complete healing (Ferguson) vs. 18% (Milligan-Morgan) 5
- At 1 month: 70.6% healed (Ferguson) vs. 57.0% (Milligan-Morgan) 2
- Mean healing time: 2.8 weeks (closed) vs. 3.5 weeks (open) 4
Bleeding Risk
Closed technique reduces postoperative bleeding risk (OR 0.50; 95% CI 0.27-0.91) 3. One study reported all four reoperations for bleeding occurred in the open group 5.
Long-Term Anal Continence
This is where closed hemorrhoidectomy shows its most important advantage:
- At 1 year: 85.3% of Ferguson patients reported no continence disturbance vs. 78.9% of Milligan-Morgan patients 2
- Incontinence scores improved significantly at 1 year in the closed group (p=0.015) but remained unchanged in the open group 2
- Patient satisfaction was significantly higher with Ferguson technique (p=0.047) 2
Operating Time
Open technique is faster to perform:
- Mean: 35 minutes (open) vs. 45 minutes (closed) 4
- This represents a consistent 10-minute difference across studies
Complications
Overall complication rates are similar between techniques 1, 3. Both carry risks of:
- Urinary retention (2-36%)
- Bleeding (0.03-6%)
- Anal stenosis (0-6%)
- Infection (0.5-5.5%)
- Incontinence (2-12%)
Clinical Decision Algorithm
Choose Closed (Ferguson) Hemorrhoidectomy when:
- Patient prioritizes faster return to normal activities
- Concern about continence preservation exists
- Patient desires better cosmetic outcome
- Surgeon is experienced with primary closure technique
Choose Open (Milligan-Morgan) Hemorrhoidectomy when:
- Shorter operative time is critical
- Concern about wound dehiscence with closure
- Extensive tissue excision required
- Surgeon preference/experience favors this approach
Important Caveats
The guideline evidence is dated (2004) but remains the primary authoritative source 1. More recent research (2006-2024) consistently supports the superiority of closed technique for wound healing and continence 2, 3, though the 2004 guideline reported equivocal results from earlier trials.
Return to work is similar (2-4 weeks) regardless of technique 1, despite faster wound healing with closed approach.
One randomized trial showed decreased pain and faster return to work with submucosal (partially closed) technique versus Milligan-Morgan 1, suggesting a spectrum exists between fully open and fully closed approaches.
The evidence suggests that when both techniques are options, closed Ferguson hemorrhoidectomy should be preferred based on superior long-term continence outcomes and faster healing, accepting a slightly longer operative time 2, 3.