An<unk> <unk> is one that has been named after the person who first described the condition. This usually involves publishing an article in a respected medical journal. Rarely an<unk> <unk> may be named after a patient (examples include Christmas<unk>  Lou Gehrig's<unk>  Hartnup<unk> and Mortimer's<unk> .
Related<unk> namings include place names (Bornholm<unk>  Lyme<unk>  Ebola hemorrhagic fever) and even societies (Legionnaires'<unk> . These, however, are not eponyms.
Eponyms are a longstanding tradition in Western science and medicine. Being awarded an eponym is regarded as an honour: "eponymity, not anonymity, is the standard" (Merton R K, 1973). It is regarded as bad form to attempt to eponymise oneself. At a time when medicine lacked the tools to investigate the underlying causes of many syndromes, the eponym was a convenient mechanism for attaching a label to a<unk>  In order to freely discuss something, it must have a name.
List of eponymous diseases
Heat stroke risk factors
Epilepsy risk factors
Anxiety risk factors
Psychosis risk factors
Sudden cardiac death laboratory findings
Delirium risk factors
Delirium causes