We describe a case of acute left-sided visual loss in a 4-year-old boy
. CT showed hyperdense retinal detachment with a tiny calcification, a
nd MR imaging showed subretinal hyperintensity on both T1- and T2-weig
hted images. Proton MR spectroscopy showed a large peak between 1 and
1.6 ppm that we believe corresponds mainly to lipids, which are charac
teristic of the exudate present in Coats disease.