Modifications in Retinal Microvascularization With Targeted Anti-angiogenic Therapy in Colorectal Cancer

Study Overview
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Brief Summary
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Retinal microvascularization can provide important informations to systemic vascular phenomena. The non-invasive quantitative description of the retinal vascularization is now possible by performing OCT-angiography and their image analysis software (vascular density and retinal perfusion). Systemic microvacular changes during the establishment of oncological treatment by targeted antiangiogenic therapy are little described in the literature. The objective of this pilot study is to describe the evolution of the retinal vascular density of patients with antiangiogenic drugs. In addition, the evolution of the retinal vascular density of patients on antiangiogenic drugs will study as a function of the response to the treatment and the toxicity of these treatments.

Detailed Description
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The main objective of this study is to describe the change in retinal vascular density of patients with first-line colorectal cancer treated with Bevacizumab.

Official Title
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Modifications in Retinal Microvascularization With OCT- Angiography in Patients With First-line Colorectal Cancer, Treated With Targeted Anti-angiogenic Therapy.

Conditions
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Colorectal Cancer

Intervention / Treatment
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* Other: OCT- Angiographie


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient over 18 years old starting first-line treatment for metastatic colorectal cancer including BEVACIZUMAB (AVASTIN®) Systemic or intraocular anti-VEGF treatment naïve ECOG ≤ 2 Exclusion Criteria: Pregnant woman, Minor patient or under legal protection Person deprived of liberty or under guardianship Inability to undergo medical monitoring of the trial Impossibility of carrying out the OCT-A Patient with a contraindication to Tropicamide 0.5% eye drops Patient with a history of degenerative macular pathology, vascular macular pathology or presenting an epiretinal membrane with traction phenomenon. Diabetes Patient for whom it is not possible to schedule an ophthalmology consultation before the start of treatment.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Experimental<br>Inclusion Before Anti-VEGF treatment: opht | Other: OCT- Angiographie<br>* Ophthalmological examinations<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| retinal vascular density retinal vascular density | this measurement will be the average of the 4 quadrants (temporal, nasal, superior and inferior 24). It will be performed by PLEX Elite 9000 Swept Source OCT-A before, during and at the end of the anti-angiogenic treatment | 12 month | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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retina, OCT-angiography, Anti-VEGF, microvascularization, Targeted therapy