Narod SA. Tamoxifen ChemopreventionâEnd of the Road?. JAMA Oncol. 2015;1(8):1033â1034. doi:10.1001/jamaoncol.2015.2247. Download citation file:
About Rare Diseases. A rare disease is defined by the European Union as one that affects less than 5 in 10,000 of the general population. There are between 6,000 and 8,000 known rare diseases. Around five new rare diseases are described in medical literature each week.
Vascular disease is a class of diseases of the blood vessels â the arteries and veins of the circulatory system of the body.It is a subgroup of cardiovascular disease. Disorders in this vast network of blood vessels, can cause a range of health problems which can be severe or prove fatal. Buerger's disease â is due to small blood vessels that inflame and swell, vessels then narrow or are blocked by blood clots. 2  Raynaud's disease â a rare disorder of constriction of the peripheral blood vessels, in the fingers and toes when the person is cold.