Lo, Y-C Headache, oestrogens, homocysteinaemia and cerebral venous thrombosis. [electronic resource] - QJM : monthly journal of the Association of Physicians Oct 2016 - 685-686 p. digital Publication Type: Case Reports; Journal Article ISSN: 1460-2393 Standard No.: 10.1093/qjmed/hcw146 doi Subjects--Topical Terms: Brain--diagnostic imagingEstrogen Replacement Therapy--adverse effectsFemaleHeadache--etiologyHumansHyperhomocysteinemia--complicationsIntracranial Thrombosis--diagnostic imagingMagnetic Resonance ImagingMiddle AgedRisk FactorsTomography, X-Ray ComputedVenous Thrombosis--diagnostic imaging