- A dictionary of medical eponyms

Osler's nodules

Related people

Painful indurated areas on the pads of the fingers and toes, the thenar and hypothenar eminences, seen in bacterial endocarditis, often preceded by an aura of burning, throbbing pruritus, or tingling. In acute bacterial endocarditis, they are associated with minute infective emboli; in subacute bacterial endocarditis, they are associated with immune complexes and small-vessel arteritis of skin. The causative organism is Staphylococcus aureus.


  • W. Osler:
    Chronic infectious endocarditis.
    Quarterly Journal of Medicine, Oxford, 1908-1909, 2: 219-230.

What is an eponym?

An eponym is a word derived from the name of a person, whether real or fictional. A medical eponym is thus any word related to medicine, whose name is derived from a person.

What is Whonamedit?

Whonamedit.com is a biographical dictionary of medical eponyms. It is our ambition to present a complete survey of all medical phenomena named for a person, with a biography of that person.


Whonamedit? does not give medical advice.
This survey of medical eponyms and the persons behind them is meant as a general interest site only. No information found here must under any circumstances be used for medical purposes, diagnostically, therapeutically or otherwise. If you, or anybody close to you, is affected, or believe to be affected, by any condition mentioned here: see a doctor.