LONG-TERM FOLLOW-UP OF SEVERE CENTRAL SEROUS CHORIORETINOPATHY USING INDOCYANINE GREEN ANGIOGRAPHY - LONG-TERM FOLLOW-UP OF CSC USING ICG ANGIOGRAPHY

Background: The severe types of central serous chorioretinopathy (CSC) have a chronic nature, suggesting that a pathological process persist s subclinically. Indocyanine green (ICG) angiography recently revealed intrachoroidal dye leakage and its static nature in CSC. As the intra choroidal dye leakage was suspected to be relevant to the disease proc ess, the long-term persistence of intrachoroidal ICG leakage was exami ned in four patients of the severe types of CSC. Methods: ICG angiogra phy was performed periodically over more than three years in three pat ients and two years in one patient. One patient had CSC with bullous r etinal detachment, and the other three had chronic CSC or diffuse reti nal pigment epitheliopathy. Results: Intrachoroidal ICG leakage persis ted in all the patients. However, a change in location of persistent i ntrachoroidal leakage or disappearance of intrachoroidal leakage regar dless of no progression of retinal pigment epithelial alteration was n oted in one eye of two patients. Conclusions: Pathology causing intrac horoidal ICG leakage persisted subclinically for a long period. Howeve r, location and extent of the intrachoroidal leakage could change duri ng a long-term follow-up period.