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Difference in Lesion Reactivation between Pure Type 2 and Mixed Type 1 and 2 Macular Neovascularization and its
Jae Hui Kim1, Jong Woo Kim1, Chul Gu Kim1
1Department of Ophthalmology, Kim's Eye Hospital, Seoul, South Korea.
Purpose:
To compare lesion reactivation and treatment outcomes between pure type 2 and mixed type 1 and 2 macular neovascularization (MNV) treated with anti-vascular endothelial growth factor (VEGF).
Methods:
This retrospective study included 155 patients diagnosed with type 2 MNV. After the initial loading injections, as-needed retreatment was provided. The difference in first lesion reactivation after the initial treatment was evaluated between pure type 2 MNV (pure type 2 group, n = 37) and mixed type 1 and 2 MNV (mixed group, n = 118). The degree of change in the best-corrected visual acuity (BCVA) was also compared between the two groups.
Results:
The mean follow-up period was 32.7 ± 13.7 months. Lesion reactivation differed significantly between the type 2 (60.0%) and mixed (84.5%) (P = .004) groups. The degree of visual change during the follow-up period also differed significantly between the pure type 2 (mean 2.8 lines of improvement) and mixed (mean 0.2 lines of deterioration) (P = .008) groups. In multivariate analysis, lesion type (P = .012) and baseline visual acuity (P = .002) were significantly associated with ≥2 lines of visual improvement.
Conclusions:
Lesion reactivation and treatment outcomes differed between pure type 2 and mixed type 1 and 2 MNV. These results suggested the need for different treatment strategies for these two MNV subtypes.
