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Type de présentationOral presentation
TitrePeripapillary intrachoroidal cavitation and deep structures at peripapillary poles
ButTo compare deep structures at peripapillary poles when a peripapillary intrachoroidal cavitation (PC) coexists with tilted disc (TD) and peripapillary staphyloma (PS) versus when only TD and PS coexist.
MéthodesIt’s a cross-sectional observational study. Radial and linear scans centered on the optic nerve head are performed with OCT. Eyes are classified according to the presence of TD, PS and PC. The posterior choroidal wall is analyzed from the peripapillary area to the Bruch’s membrane opening. Three choroidal configurations are analyzed on the γ-zone side: regular convexity, loss of convexity and triangular deformation. Discontinuity of the border tissue below Bruch's membrane (BT) and suprachoroidal detachment are also looked for.
Résultats334 patients are enrolled. Choroidal triangular deformation is observed in 86,1% of eyes with PC, in 21,4% of eyes combining PS and TD without PC and in 4,7% of eyes affected either by PS or by TD. This configuration is statistically more frequent in eyes with PC as compared to those combining PS and TD without PC (Chi2 test, p<0,01). Suprachoroidal detachment and BT discontinuity are only seen in eyes with PC (Fisher's test, p<0,001).
ConclusionThe statistical correlation between PC and the choroidal triangular deformation on the one hand and BT discontinuity on the other hand, suggests the role of mechanical factors in the etiology of PC. The progressive choroidal deformation, from regular convexity to triangular configuration, is rarely seen without the PS-TD combination. It suggests that stresses causing these deformations are applied when TD and PS coexist. Suprachoroidal detachment, only seen in case of PC, could be a diagnostic criterion for PC.
Conflit d'intérêtNon
Auteur 1
NomBACQ
InitialesN
InstitutHôpital Erasme
VilleBrussels
Auteur 2
NomDUGAUGUIER
InitialesA
InstitutHôpital Erasme
VilleBrussels
Auteur 3
NomKISMA
InitialesN
InstitutHôpital Erasme
VilleBrussels
Auteur 4
NomALAOUI
InitialesY
InstitutHôpital Erasme
VilleBrussels
Auteur 5
NomCOPPENS
InitialesK
InstitutHôpital Erasme
VilleBrussels
Auteur 6
NomLEROY
InitialesK
InstitutLaboratoire de neuro-anatomie, ULB
VilleBrussels
Auteur 7
NomBREMER
InitialesF
InstitutHôpital Erasme
VilleBrussels
Auteur 8
NomEHONGO
InitialesA
InstitutHôpital Erasme
VilleBrussels
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