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In isolated fracture of the trochanter minor the patient a sitting position is unable to raise his leg or flex it at the thigh joint; both are possible for the patient in a supine position.

 Ludloff established the sign in 1909 (Allgemeine medizinische Zentral-Zeitung, 1909, 78: 479), and the eponymic term was introduced by Hannemüller in 1910.


Das Ludloff’sche Zeichen bei der isolierten Abrissfraktur des Trochanter minor
[Brun’s] Beiträge zur klinischen Chirurgie, 1910, 70: 905-911.

Pat Forbis and Susan L. Bartolucci:
Stedman's Medical Eponyms. Lippincott Williams & Wilkins, Philadelphia, 1998.

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.

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