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[Acute choriocapillaris occlusion in pregnancy and puerperium. Toxemias, thrombotic microangiopathies].

Six cases of gravidic toxemia (4) and thrombotic thrombocytopenic purpura (Moschowitz's disease) in puerperium with choriocapillaris occlusion, were examined. At the acute stage, the vision is improved, ophthalmoscopy of the fundus revealed cystlike bullous exudative subretinal with retinal detachment, yellowish spots (of retinal pigment epithelium) and often minimal localized arteriolar narrowing. The evolution included retina application pigmentary disturbances and Elschnig's spots. Fluorescein angiography showed delayed filling of the capillaris and dye leakage in the subretinal space (first hypofluorescence and late hyperfluorescence). There are various stages of ischaemic involvement but in all cases visual symptoms may be due to central obstructive choroidopathy with delayed filling and occlusion. The retinal detachment in toxemia or Moschowitz disease in pregnancy in secondary to microcirculatory choroidal damage (short ciliary vessels essentially) with rupture of blood retinal barrier. Other constatations are made in disseminated intravascular coagulation, periarteritis nodosa, accelerated nephrosclerosis, hemolytic uremic syndrome in puerperium, and these suggested possible relationship between the various conditions.