recurrence of the pterygium after excision: what factors do relate it?
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Recurrence of the pterygium after excision: What factors do relate it?. Hong Kyun Kim Dept. of Ophthalmology Kyungpook National University School of medicine. Purpose. To evaluate the factors that influence the recurrence of the pterygium after excision. Patients and Methods. - PowerPoint PPT PresentationTRANSCRIPT
Recurrence of the pterygium after excision: What factors do relate
it?
Hong Kyun KimDept. of Ophthalmology
Kyungpook National University School of medicine
Purpose• To evaluate the factors that influence the re-
currence of the pterygium after excision
Patients and Methods• 37 eyes of patients including 14 males and 23 females
pterygium in the age range of 22 – 66 years (mean age 52.4 years ± 12.1)
• There were 20 eyes of primary pterygium and 17 re-current pterygium.
• Each eyes underwent a complete ocular examination and were taken photograph to evaluate the molpho-logic severity of pterygium
Patients and Methods – Exclusion Criteria
• patients with pseudopterygium• patients with severe dry eye syndrome, meibo-
mian gland dysfunction, neurotrophic keratitis.• if the patients did not follow up at least 6months
Patients and Methods - Preoperaitve morphologic severity grading by Slit lamp Photography
Evaluate the thickness, vascularity, the amount of encroachment on cornea of the fibrovascular pro-liferation - Thickness (T) - Vascularity (V) - Location(L)
Grade of Thickness (T) • T0 : no elevation
• T1 : minimal elevation with definite con-firmation of episcleral vessel in most of the elevated area.
• T2 : moderate elevation, episcleral ves-sel can be found in some of the elevated area.
• T3 : marked elevation, episcleral vessel cannot be found because of the pterygial fleshiness.
Grade of Vascularity (V)• We use the computer program (Adobe Photo-
shop ver.9.0) to compare the vascularity of each pterygial proliferation
equalized and in-verted photo from original photo
original photograph
Grade of Vascularity (V)
• V0 : no directional vascular pattern
• V1 : minimal vascu-larization with uni-directional patterm
• V2 : moderate vas-cularization with unidirectional and enlarged vessels
• V3 : marked vascu-larization with uni-directional, en-gorged vessels
V0
V2
V1
V3
Location (L)• L1 : abnormal fibrovascular tissue were con-
fined conjunctival area• L2 : abnormal fibrovascular tissue were lo-
cated in limbal area. • L3 : abnormal fibrovascular tissue were en-
croached over limbal area. (> 1.0 mm from limbus)
Surgical TechniquePterygial Excision Method• Subconjunctival 2% lidocaine• Mark the incision line with the gentian violet • The head of Pterygium was avulsed with a 0.3mm toothed
forceps• Wescott scissors was used to dissect the underlying con-
junctiva and Tenon’s capsule and excised the Tenon.• with or without 0.04% MMC sub Tenon’s soaking for 2min.• excise additional exposed Tenon’s capsuleCovering methods over pterygium excised area• Conjunctival Autograft• Conjuntival Autograft + Amniotic membrane graft• Amniotic membrane graft
Patient F/U• include who completely followed up over
6months• Definition of Recurrence “a certain amount of fibrous reproliferation with unidi-
rectional vascularity after excisional operation” - Recurrence that need the Re-operation 1. Recurrence over the > 1mm past the limbus (L3) with
T3 or V3 2. fibrovascular proliferation over L2 with adhesive trac-
tion that results in diplopia - Conjuntival Recurrence Recurrence within L2 and do not cause the diplopia
Evaluation of Risk factor for Recurrence• Univariate Analysis (Chi-squre test, SPSS for Windows ver.12.0,
P<0.05) comparison of the incidence of the recurrence in following variables Preoperative morphologic feature 1. primary / recurrence 2. preoperative fibrous thickness (T2 /T3) 3. preoprative vascularity 4. symblepharous fibrous traction Operation technique 1. amniotic membrane 2. conjunctive autograft
Adjunctive Treatment 1. preopeative TA subconjunctival injection 2. preoperative MMC injection 3. intraoperative 0.04% MMC soaking
• Multivariate analysis (Logistic Regression Analysis, SPSS for Win-dows ver. 12.0, p<0.05))
Results• follow-up period - mean 8.4 ±4.6 (6-18 months)• Recurrence rate - total recurrence rate 14/37 eyes (37.8%) - conjunctival recurrence rate 10/37 (27.0%) - Recurrence that need the Re-operation 4/37 (10.8%
• There were no statistic significance in preoperative mophologic variables and Adjunctive treatment
• Conjunctival Autograft was the only statistically significant vari-able.
- Fisher’s exact test, p=0.015; OR 7.08; 95% CI 1.60-31.33 - Multiple logistic regression analysis, p=0.028; OR 5.42; 95% CI 1.20-24.52)
Conclusion• preoperative morphologic factors or adjunc-
tive treatment did not affect the recurrence of the pterygium
• conjunctival autograft was significantly de-creased the risk of the reccurence of the pterygium