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Ophthalmology > CHOROID
Choroidal Rupture
Article Last Updated: Jul 19, 2007
AUTHOR AND EDITOR INFORMATION
Section 1 of 10
Author: Lihteh Wu, MD, Consulting Surgeon, Department of Ophthalmology, Vitreo-Retinal Section, Instituto De Cirugia Ocular, Costa Rica
Lihteh Wu is a member of the following medical societies: American Academy of Ophthalmology, American Society of Retina Specialists, Association for Research in Vision and Ophthalmology, and Pan-American Association of Ophthalmology
Coauthor(s):
Teodoro Evans, MD, Retina Fellow, Vitreo-Retinal Section, Instituto De Cirugia Ocular, Costa Rica
Editors: Russell P Jayne, MD, Consulting Vitreoretinal Surgeon, The Retina Center at Las Vegas; Simon K Law, MD, PharmD, Assistant Professor of Ophthalmology, Jules Stein Eye Institute; Chief of Section of Ophthalmology Surgical Services, Department of Veterans Affairs Healthcare Center, West Los Angeles; Steve Charles, MD, Director of Charles Retina Institute; Clinical Professor, Department of Ophthalmology, University of Tennessee College of Medicine; Lance L Brown, OD, MD, Ophthalmologist, Affiliated With Freeman Hospital and St John's Hospital, Regional Eye Center, Joplin, Missouri; Hampton Roy Sr, MD, Associate Clinical Professor, Department of Ophthalmology, University of Arkansas for Medical Sciences
Author and Editor Disclosure
Synonyms and related keywords:
choroidal break, Bruch membrane, Bruch's membrane, retinal pigment epithelium, RPE, choroidal neovascularization, CNV
Background
Choroidal ruptures are breaks in the choroid, the Bruch membrane, and the retinal pigment epithelium (RPE) that result from blunt ocular trauma (the most common eye injury). Choroidal rupture can be secondary to indirect or direct trauma. Cases secondary to direct trauma tend to be located more anteriorly and at the site of impact and parallel to the ora, whereas those secondary to indirect trauma occur posteriorly. These ruptures have a crescent shape and are concentric to the optic disc. Indirect choroidal ruptures are almost 4 times more common than direct ruptures.
Pathophysiology
After blunt trauma, the ocular globe undergoes mechanical compression and then sudden hyperextension. Because of its tensile strength, the sclera can resist this insult; the retina is also protected because of its elasticity. The Bruch membrane does not have enough elasticity or tensile strength; therefore, it breaks. Concurrently, the small capillaries in the choriocapillaris are damaged, leading to subretinal or sub-RPE hemorrhage. Hemorrhage in conjunction with retinal edema may obscure the choroidal rupture during the acute phases. The deep choroidal vessels are usually spared. As the blood clears, a white, curvilinear, crescent-shaped streak concentric to the optic nerve is seen.
During the healing phase, choroidal neovascularization (CNV) occurs. In most cases, it involutes spontaneously. If the rupture does not involve the fovea, good vision is expected. In 15-30% of patients, CNV may arise again and lead to a hemorrhagic or serous macular detachment with concomitant visual loss. This usually occurs during the first year but can also occur decades later. Older age and macular rupture, the length of the rupture, and the distance of the rupture to the center of the fovea may be risk factors for CNV.
Frequency
United States
Blunt ocular trauma is the most common type of eye injury. Approximately 5-10% of patients with such injury develop a choroidal rupture. Most eyes have a single rupture, but up to 25% of eyes have multiple ruptures. About 80% of ruptures occur temporal to the disc, and 66% involve the macula.
Mortality/Morbidity
Vision loss depends on whether the choroidal rupture involves the fovea and whether and where CNV occurs.
Sex
- Men appear to be more prone to ocular trauma than women.
- A male-to-female ratio of 5:1 is reported for choroidal ruptures.1, 2
Age
In most series, this condition occurs in patients aged 20-40 years.1, 2
History
- History of blunt trauma
- History of angioid streaks
- Paracentral or central scotoma
- Decreased vision
Physical
- Retinal edema
- Hemorrhagic detachment of the macula
- Serous detachment of the macula
- Subretinal hemorrhage
- White curvilinear crescent-shaped streak concentric to the optic nerve
Causes
- Blunt trauma
- Angioid streaks
Angioid Streaks
ARMD, Exudative
Neovascular Membranes, Subretinal
Neovascularization, Choroidal
Presumed Ocular Histoplasmosis Syndrome
Pseudoxanthoma Elasticum
Because choroidal ruptures occur as a consequence of blunt ocular trauma, the ocular examination must be thorough to rule out orbital fractures or globe ruptures.
Imaging Studies
- Consider CT scanning and MRI of the eye and orbit under appropriate circumstances.
- Fluorescein angiography may be a useful adjunct to detect CNV.
- If CNV is absent, hypofluorescence occurs during the early phase of the angiogram due to disruption of the choriocapillaris. During later stages, hyperfluorescence occurs from the adjacent healthy choriocapillaris.
- If CNV is present, early hyperfluorescence followed by late leakage is present on the angiogram.
- Indocyanine green (ICG) angiography may be useful if subretinal blood blocks or hides CNV detection on a fluorescein angiogram.
Histologic Findings
Direct choroidal ruptures are characterized by a complete absence of choroid and RPE. The overlying retina is intact but atrophic.
In indirect choroidal ruptures, CNV is a common finding during the early healing phases. Most CNV is in the subretinal space (Gass type 2). With time, most CNV involutes spontaneously. In a small number of cases, a disciform scar or fibrous tissue may grow into the retina and vitreous cavity.
Medical Care
Conservative treatment is recommended for most choroidal ruptures. During the healing phase of virtually all choroidal ruptures, CNV is present. Most CNV involutes spontaneously.
Surgical Care
In 15-30% of patients, CNV may recur and lead to a hemorrhagic or serous macular detachment with concomitant visual loss.
- If CNV is extrafoveal, it may be treated successfully with laser photocoagulation. Recurrences seem few.
- If CNV is subfoveal or juxtafoveal, consider pars plana vitrectomy with membrane extraction.
- The role of photodynamic therapy with verteporfin is unclear; however, several case reports and case series using this treatment have shown encouraging results in these patients.
- ICG-guided photocoagulation transiently closes feeder vessels of subfoveal CNV, but, eventually, these vessels become reperfused.
Consultations
Consult a vitreoretinal specialist.
Further Outpatient Care
- Most CNV occurs within the first year. However, CNV has been reported to occur as late as 35 years after the choroidal rupture.
- Regularly scheduled examinations with fluorescein angiography (as circumstances dictate) are recommended during the first year.
Complications
- In 15-30% of patients, CNV may arise and lead to a hemorrhagic or serous macular detachment with concomitant visual loss.
Prognosis
- Most patients with choroidal ruptures do not reach a final visual acuity of 20/40 or better. Poor visual acuity is associated with macular rupture and poor baseline visual acuity.
- If the rupture does not involve the fovea, good vision is expected.
- A hemorrhagic or serous macular detachment secondary to CNV may threaten visual function.
- If CNV is extrafoveal, it may respond well to laser photocoagulation. Few recurrences are reported after laser photocoagulation.
- If CNV is juxtafoveal or subfoveal, consider pars plana vitrectomy with membrane extraction. Gross et al reported good visual acuities in a small case series.3
Patient Education
- Teach patients to self-monitor each eye by using an Amsler grid and a near card.
Medical/Legal Pitfalls
- Choroidal neovascularization can reoccur, and periodic examinations are necessary.
| Media file 1:
A 23-year-old man was in a motor vehicle accident 2 months before his presentation. His visual acuity is 20/400, and an afferent pupillary defect is present. Traumatic optic neuropathy and choroidal rupture are observed. This is a red-free photograph. (Courtesy of Jorge Gutierrez, MD.) |
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Media type: Photo
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| Media file 2:
Mid-phase fluorescein angiogram in the same patient as in Media file 1. (Courtesy of Jorge Gutierrez, MD.) |
 | View Full Size Image | |
Media type: Photo
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| Media file 3:
Late-phase fluorescein angiogram in the same patient as in Media file 1. (Courtesy of Jorge Gutierrez, MD.) |
 | View Full Size Image | |
Media type: Photo
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Choroidal Rupture excerpt Article Last Updated: Jul 19, 2007
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