Fig. 21. Subacute sclerosing panencephalitis. A. Focal area of retinitis noted in the posterior pole.B. Fluorescein angiogram shows minimal blockage inferior to the macula corresponding to the areaof the retinitis. (Park DW, Boldt HC et al: Subacute sclerosing panencephalitis manifesting as viral retinitis: clinical and histopathologic findings. Am J Ophthalmol 123:533, 1997.)