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.
A medical condition is a broad term that includes all diseases and disorders. A disease is an abnormal condition affecting the body of an organism. A disorder is a functional abnormality or disturbance. 1  List of cancer types. 2  List of cutaneous conditions. 3  List of endocrine diseases. 4  List of eye diseases and disorders. 5  List of intestinal diseases. 6  List of infectious diseases. 7  List of human diseases associated with infectious pathogens.