zebra
In medicine, a common disease presenting with unusual symptoms. Also applies to a patient with symptoms common to several diseases in which the first diagnosis is of a rare or obscure disease, when the truth is a more mundane disorder. The term was popularised by Scrubs. Derived from the axiom "When you hear hoofbeats, think 'horses', not 'zebras'.
If a patient presents with vomiting, dairrhoea, and fever, West Nile Virus is a zebra; they're more likely to have enteropathogenic E. coli infection.
By Rhodoferax