The continuum of primary retinal telangiectasia.

Background: Primary retinal telangiectasia is characterized by abnormalities in the retinal vasculature. Any alteration of the normal retinal vasculature may result in variable degrees of retinal leakage, hemorrhages, and exudates. The retinal telangiectatic conditions of Coats' disease, Leber's miliary aneurysms, and idiopathic macular telangiectasia (IMT), although historically considered separate entities, may in fact be variants of the same pathophysiologic vascular process.

"Idiopathic" intracranial hypertension caused by venous sinus thrombosis associated with contraceptive usage.

Background: Cerebral venous sinus thrombosis (CVST) is a life-threatening condition that may present with symptoms and signs identical to idiopathic intracranial hypertension (IIH). Both conditions consist of increased intracranial pressure (ICP); however, IIH shows no evidence of contributory intracranial pathology. Oral hormonally based contraceptive usage has been associated with both conditions as well.