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.
Medical condition. A medical condition is a broad term that includes all diseases, lesions and disorders. While the term medical condition generally includes mental illnesses, in some contexts the term is used specifically to denote any illness, injury, or disease except for mental illnesses. localized disease is one that affects only one part of the body, such as athlete's foot or an eye infection. Disseminated disease. A disseminated disease has spread to other parts; with cancer, this is usually called metastatic disease.