From the Guidelines
Transposition of pterygium and excision of pterygium are two different surgical approaches to treat pterygium, with the main difference being the method of removing the pterygium tissue.
Key Differences
- Transposition of pterygium involves moving the conjunctiva from a healthy area to the site of the pterygium, whereas
- Excision of pterygium involves removing the pterygium tissue altogether 1.
Surgical Considerations
Both procedures carry a risk of new-onset diplopia, which can occur due to direct injury to the adjacent medial rectus or florid scarring associated with recurrence 1.
Post-Surgical Complications
The choice of anesthesia, such as retrobulbar anesthesia, can increase the risk of diplopia after surgery 1.
Management of Complications
If diplopia persists after several months, referral to a strabismus specialist is warranted 1.
From the Research
Difference between Transposition of Pterygium and Excision of Pterygium
- Transposition of pterygium involves moving a conjunctival flap to cover the area where the pterygium was removed, as seen in the "symmetrical conjunctival flap transposition" technique 2.
- Excision of pterygium involves removing the pterygium tissue, which can be done using various techniques, including simple excision, excision with conjunctival autograft, or excision with amniotic membrane graft 3, 4.
Key Differences
- Transposition techniques, such as the mini-flap technique, may have lower recurrence rates and fewer complications compared to excision alone 5.
- Excision with conjunctival autograft or amniotic membrane graft may be effective in preventing recurrence, especially in cases of recurrent pterygium 4.
- The choice of technique may depend on the size and location of the pterygium, as well as the surgeon's preference and experience 6.
Considerations
- Recurrence rates vary depending on the technique used, with transposition techniques and excision with conjunctival autograft or amniotic membrane graft generally having lower recurrence rates 3, 2, 5, 4.
- Complications, such as conjunctival scarring or granuloma, may be more common with certain techniques, such as large-flap techniques 5.
- The use of adjuvant therapies, such as mitomycin C, may also affect the outcome of pterygium surgery 2, 5, 4.