Abstract
Background
Macular hole (MH) is a retinal break in the fovea involving partial or complete dehiscence of the neural retinal layers affecting the visual quality by decreasing visual acuity (VA) and visual deformation. We describe a case of secondary MH associated with submacular hemorrhage (SMH) due to polypoidal choroidal vasculopathy (PCV), which showed spontaneous closure.
Case presentation
A 67-year-old man developed decreased VA in his right eye due to an SMH. The VA was 20/50, and monthly intravitreal injection of aflibercept was administered three times. The SMH gradually decreased, and 10 months later the external limiting membrane was found to be perforated, resulting in MH. The old clot disappeared, and the MH remained for 10 months. Twenty-three months later, serous retinal detachment (SRD) involving the macula appeared and the MH had disappeared. SRD gradually disappeared, and macular configuration recovered. VA gradually improved and became 20/20 38 months later.
Conclusion
Dynamic change of the ultrastructure in an unusual case of secondary-developed and spontaneously closed MH was clearly observed. Although the mechanism was unknown, the small diameter size and exudative PCV are thought to have contributed to the closure.
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Macular hole (MH) is a retinal break in the fovea involving partial or complete dehiscence of the neural retinal layers affecting the visual quality by decreasing visual acuity (VA) and visual deformation [1]. Formation of an idiopathic MH has been attributed to mechanical forces exerting tangential traction at the vitreomacular interface. Secondary MH may develop in association with trauma [2], macular edema [3], retinal detachment [4], choroidal neovascularization [5,6,7], or submacular hemorrhage (SMH) [8,9,10]. Spontaneous closure is a rare event [7, 10,11,12,13,14,15,16]. We present a rare case of the development of secondary MH and spontaneous closure of MH associated with SMH due to polypoidal choroidal vasculopathy (PCV).
Case presentation
A 67-year-old man developed decreased VA in his right eye due to SMH. Fundus examination showed vitreoretinal separation and subretinal hemorrhage centering superior nasal to the optic disc and hanging over the macula. Fundus angiography revealed PCV (Fig. 1). The VA was 20/50 and monthly intravitreal injection of aflibercept (IVA) was administered three times. The SMH gradually decreased, and 10 months later the external limiting membrane (ELM) was found to be perforated, resulting in MH at 12 months after the initial visit. The minimum diameter of MH was 145 μm. Because the patient refused to undergo surgery, the MH remained for 10 months after MH developed. Twenty-three months after the initial visit, serous retinal detachment (SRD) involving the macula appeared and the MH disappeared. Fundus angiography showed moderate leakage from PCV, and IVA was performed again. Twenty-four months after the initial visit, the SRD gradually disappeared, and macular configuration recovered. During the course of the treatment, VA gradually improved and became 20/20 38 months after the initial visit (Fig. 2). The distance between the fovea and the optic disc margin before MH closure was 3654 μm. After MH closure, the distance was 3899 μm. There was no appearance of foveal displacement toward the optic disc after MH closure (Fig. 3).
Discussion and conclusions
We presented a rare case of development of secondary MH and spontaneous closure associated with SMH due to PCV. Two unusual findings were observed: late onset of secondary MH associated with SMH due to PCV and spontaneous closure and return of excellent VA.
Several macular pathologies have been reported that may develop secondary MH such as cystoid macular edema, subretinal fluid due to rhegmatogenous retinal detachment, and SMH [2,3,4,5,6,7,8,9,10]. In most of the secondary MH associated with SMH, the SMH was caused by rupture of a retinal arterial macroaneurysm (RAM) [17,18,19]. There are several reports of secondary MH associated with choroidal neovascularization, but they developed after absorption of submacular fluid, not SMH [5,6,7]. To the best of our knowledge, this is the first report of a case of secondary MH associated with SMH due to PCV.
In a case of SMH due to RAM, it was considered that secondary MH was caused by rapid increase in intraretinal pressure (early onset) or by retinal degeneration (late onset) [18]. Sagara et al. reported that the presence of subretinal and sub-internal limiting membrane (ILM) hemorrhages after rupture of a RAM might contribute to formation of an MH [17].
Experimental studies on animals have also shown relationships between SMH and severe retinal degeneration [20, 21]. Fibrin-mediated retinal damage may be an important cause of retinal degeneration related to subretinal hemorrhage [22]. Another explanation might be that retinal inflammation was associated with the pathogenesis of MH formation as indicated by Hayashi et al. [13].
Several mechanisms for MH formation have been previously hypothesized: anteroposterior and tangential traction caused by vitreous incarceration in a needle entry site [5, 6], exacerbated tangential traction from contraction of the vascular membrane [5, 6], and critical reduction in the cell–cell attachments of the retinal pigment epithelium following anti-vascular endothelial growth factor treatment [23].
In the current case, perifoveal vitreous detachment was seen on the first visit, and there was no change in the vitreoretinal interface in the course of MH formation. Thereafter, the MH appeared 12 months after the patient’s first visit. Thus, we hypothesized that the process that created this MH (late onset) was retinal degeneration or retinal injury by SMH.
An outstanding feature is that the patient in our case showed spontaneous MH closure without surgery and achieved excellent VA recovery. A previous report showed that a secondary MH, which was associated with intravitreal injection for choroidal neovascularization (CNV), achieved closure after surgery [5]. Another study reported closure of MH that developed in association with SMH due to CNV or RAM achieved by vitrectomy with ILM peeling and tamponade [8, 9].
Several case studies have also reported spontaneous closure of MH and have attributed the cause to vitreomacular traction relief over time (vitreoretinal separation), formation of bridging intraretinal tissue (due to epiretinal membrane, extension and proliferation of glial cells, or collagen secreted by glial cells), absorption of cystic space, sharp edge, inflammation, and small size of MH [1, 12, 16, 24]. Su et al. reported spontaneous closure of full thickness MH with age-related macular degeneration and suggested that the exudative process or secondary healing that stimulated adjacent glial cells contributed to MH closure [7]. Oliver et al. and Wang et al. reported that macular detachment, which released the retina from the retinal pigment epithelium (RPE), might have prompted approximation of the MH edge, thus facilitated MH closure [25, 26]. In the current case, SRD, which appeared in the macular area, probably facilitated approximation of the MH edges by releasing the MH edge from the RPE. Therefore, the exudative change and accumulation of submacular fluid might have contributed to the spontaneous MH closure. Moreover, in the case of traumatic MH, small size and absence of intraretinal cysts were predictive factors of spontaneous closure of MH [24]. The authors described that the presence of intraretinal cysts might be an indicator of ILM traction. In the current case, the MH diameter was small and there was no appearance of intraretinal cysts, both of which might be associated with spontaneous closure.
Kawano et al. reported that successful closure of MH by vitrectomy with ILM peeling and gas tamponade led to a displacement of the center of the macula and that eyes with spontaneous MH closure without surgery had no significant foveal displacement [14]. In the current case, there was no appearance of foveal displacement toward the optic disc after MH closure. Thus, we hypothesized that several factors, such as the small diameter of the MH, absence of intraretinal cysts, and associated presence of exudation and macular detachment with PCV, contributed to the spontaneous MH closure but that closure was not related to the release of macular traction.
In conclusion, we presented a rare case of secondary MH and spontaneous closure, which was associated with SMH and PCV. Imaging analysis clearly illustrated the dynamic course of the formation and closing phase of the MH. Although the precise mechanism of closure was unknown, the small size of the MH and exudation due to PCV are thought to have contributed to it.
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Abbreviations
- CNV:
-
Choroidal neovascularization
- ELM:
-
External limiting membrane
- ILM:
-
Internal limiting membrane
- IVA:
-
Intravitreal aflibercept injection
- MH:
-
Macular hole
- PCV:
-
Polypoidal choroidal vasculopathy
- RAM:
-
Retinal arterial macroaneurysm
- SMH:
-
Submacular hemorrhage
- SRD:
-
Serous retinal detachment
- VA:
-
Visual acuity
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Acknowledgements
The authors thank Editage (https://www.editage.jp) for the English language review.
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This study was supported in part by the Japan Society for the Promotion of Science (JSPS; KAKENHI grant number: 17 K11430). Funding was provided for English editing during manuscript preparation and for the publishing fee.
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MC and TN cared for the patient, performed the workup, and carried out the treatment. MC, YY, and JK prepared the figures. YY, TS, YS, TK, MS, JM, and KS collected data, analyzed the ophthalmological findings, and gave critical suggestions. YY and KS prepared the manuscript. All authors agree to be accountable for all aspects of work. Patient anonymity is preserved. All authors attest that they meet the current ICMJE criteria for authorship. All authors read and approved the final manuscript.
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Chino, M., Yoshikawa, Y., Kanno, J. et al. Development and spontaneous closure of a secondary macular hole associated with submacular hemorrhage due to polypoidal choroidal vasculopathy: a case report. BMC Ophthalmol 20, 108 (2020). https://doi.org/10.1186/s12886-020-01370-8
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DOI: https://doi.org/10.1186/s12886-020-01370-8