Significant erosion of the concave surface of a joint; results in migration of the convex surface medially.
See also: Otto disease.
[arthro- + G. katadysis, a dipping under, a setting, fr. dyō, to make sink]
Farlex Partner Medical Dictionary © Farlex 2012


Adolph W., German surgeon, 1786-1845.
Otto disease - characterized by an inward bulging of the acetabulum into the pelvic cavity, resulting from arthritis of the hip joints. Synonym(s): arthrokatadysis; Otto pelvis; protrusio acetabuli
Otto forceps
Otto pelvis - Synonym(s): Otto disease
Medical Eponyms © Farlex 2012
References in periodicals archive ?
This inward protrusion of the acetabulum is commonly referred to as Otto pelvis, protrusio acetabuli, or arthrokatadysis (from ancient Greek: literally meaning subsidence of a joint).
(23.) Scandalis R, Ghormley RK, Dockerty MB: Arthrokatadysis (Otto pelvis).

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