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.
Rare Diseases. Eosinophilia-myalgia syndrome (EMS) is a rare disorder that causes inflammation in different parts of the body including muscles, skin, and lungs. EMS causes high levels of white blood cells known as eosinophils. These eosinophils build up within the body and can cause serious complications.